BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//A3veen.nl - ECPv6.16.3//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://www.a3veen.nl
X-WR-CALDESC:Evenementen voor A3veen.nl
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Amsterdam
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20190331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20191027T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20200329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20201025T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20210328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20211031T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20220327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20221030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20230326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20231029T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20260329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20261025T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20270328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20271031T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20280326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20281029T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20290325T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20291028T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20300331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20301027T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20310330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20311026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20320328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20321031T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20330327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20331030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20340326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20341029T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20350325T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20351028T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20360330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20361026T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200210
DTEND;VALUE=DATE:20270211
DTSTAMP:20260601T152616
CREATED:20200210T110815Z
LAST-MODIFIED:20250612T103614Z
UID:126725-1581292800-1802303999@www.a3veen.nl
SUMMARY:Solar Orbiter
DESCRIPTION:De Solar Orbiter (SOLO) is een ruimtemissie van de Europese Ruimtevaartorganisatie (ESA) en de Amerikaanse Ruimtevaartorganisatie (NASA)\, het doel is om een observatiesatelliet in een baan rond de Zon te brengen. \nDe onbemande ruimtesonde werd op 10 februari 2020\, om 4:03 (UTC) met een Atlas V-411-raket vanaf lanceercomplex SLC-41 op Cape Canaveral AFS gelanceerd. Vanaf een elliptische baan observeert de Solar Orbiter de Zon op dichte afstand\, tot maar 0\,22 AU (ongeveer een vijfde van de afstand tussen de zon en de Aarde)\, ofwel 48 keer de straal van de Zon. Dit maakt het mogelijk om foto’s te nemen van de zon op hogere resolutie dan ooit tevoren. Vooral de poolregio’s van de Zon zijn met de satelliet veel beter te zien dan vanaf de Aarde. Naast het fotograferen\, observeren en beter in kaart brengen van de Zon doet de ruimtesonde ook onderzoek naar de heliosfeer\, het gebied rond de Zon waar de zonnewind overheerst. De ruimtesonde wordt voortgedreven door een ionenmotor (Solar Electric Primary Propulsion). Deze zet met behulp van zonnepanelen zonlicht om in elektriciteit. Hiermee worden gasatomen elektrisch geladen. Als deze het ruimtevaartuig verlaten stuwen ze door hun reactiekracht het ruimtevaartuig voort. Dit betrekkelijk nieuwe type aandrijving werd met succes getest door de SMART-1\, een observatiesatelliet van ESA die van 2003 tot 2006 in een baan rond de Maan draaide. De Solar Orbiter is de opvolger van twee eerdere ruimtesondes naar de Zon\, de Ulysses (gelanceerd in 1990) en de SOHO (gelanceerd in 1995). Het oorspronkelijke besluit tot de Solar Orbiter-missie werd in 2001 genomen.[2] Na enkele jaren van voorbereidend onderzoek kreeg het programma in 2007 het groene licht voor de formele definitiefase. De Solar Orbiter is onderdeel van het HELEX (Heliophysics Explorers)-onderzoeksprogramma\, samen met de Parker Solar Probe van NASA die in augustus 2018 gelanceerd is en de Zon nog veel dichter benadert dan de Solar Orbiter\, tot maar 9 keer de straal van de Zon. NASA werkt ook mee aan de Solar Orbiter: de organisatie was verantwoordelijk voor de boeking van de Atlas V-lanceerraket en leverde daarnaast ook instrumenten. \nWhy Solar Orbiter is angling towards the Sun’s poles\, klik op afbeelding voor vergroting of hier voor info\n\nLinks:\nSolar Orbiter \nSolar Orbiter gets world-first views of the Sun’s poles
URL:https://www.a3veen.nl/event/solar-orbiter/
CATEGORIES:Astronomie,Zon
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20211225T132000
DTEND;TZID=Europe/Amsterdam:20311225T170000
DTSTAMP:20260601T152616
CREATED:20230729T144352Z
LAST-MODIFIED:20260226T142452Z
UID:92704-1640438400-1955984400@www.a3veen.nl
SUMMARY:#UnfoldTheUniverse #JWST James Webb Space Telescope / Henrietta Leavitt Teleskop
DESCRIPTION:The James Webb Space Telescope (JWST or “Webb” / called Henrietta Leavitt Teleskop by german scientists Harald Lesch and Josef M. Gaßner) is a space telescope to succeed the Hubble Space Telescope as NASA’s flagship astrophysics mission. \nThe JWST will provide improved infrared resolution and sensitivity over Hubble\, and will enable a broad range of investigations across the fields of astronomy and cosmology\, including observing some of the most distant events and objects in the universe\, such as the formation of the first galaxies. The primary mirror of the JWST\, the Optical Telescope Element\, is composed of eighteen 1.32 metres hexagonal mirror segments made of gold-plated beryllium which combine to create a 6.5 metres diameter mirror that is considerably larger than the Hubble’s 2.4 metres mirror. Unlike the Hubble\, which observes in the near ultraviolet\, visible\, and near infrared (0.1 to 1 μm) spectra\, the JWST will observe in a lower frequency range\, from long-wavelength visible light through mid-infrared (0.6 to 28.3 μm)\, which will allow it to observe high redshift objects that are too old and too distant for the Hubble to observe. \nThe telescope must be kept very cold in order to observe in the infrared without interference\, so it will be deployed in space near the Earth–Sun L2 Lagrangian point\, and a large sunshield made of silicon-coated and aluminium-coated Kapton will keep its mirror and instruments below 50 Kelvin (K). The JWST is being developed by NASA — with significant contributions from the European Space Agency and the Canadian Space Agency — and is named for James E. Webb\, who was the administrator of NASA from 1961 to 1968 and played an integral role in the Apollo program. The prime contractor is Northrop Grumman. Development began in 1996 for a launch that was initially planned for 2007 and a 500-million-dollar budget\, but the project has had numerous delays and cost overruns\, and underwent a major redesign in 2005. The JWST’s construction was completed in late 2016\, after which its extensive testing phase began. The launch date was Dec. 25\, 2021. \n\nLinks:\nJames Webb Space Telescope \nJames Webb Space Telescope -ESA \nWebb Home \nWebb Space Telescope \nNASA’s James Webb Space Telescope – Flickr \nJADES will go deeper than the Hubble Deep Fields \nJames Webb Space Telescope / Henrietta Leavitt Teleskop – playlist \nNASA’s Webb In Full Focus\, Ready for Instrument Commissioning \nNieuwe ruimtetelescoop kijkt naar het begin van de tijd – of net ietsje later \nWebb is now orbiting L2 \nPhotons Received: Webb Sees Its First Star – 18 Times \nNASA emails reveal internal discussions over calls to rename James Webb Space Telescope: report \nFirst Images From NASA’s Webb Space Telescope Coming Soon \nNo\, the Big Bang theory is not ‘broken.’ Here’s how we know \nWebb Looks for Fomalhaut’s Asteroid Belt and Finds Much More \nJames Webb spot monsterachtige waterpluim op Enceladus \nWebb Space Telescope’s First Year of Science Celebration \nWebb Discovers Methane\, Carbon Dioxide in Atmosphere of K2-18 b \nNASA’s James Webb Space Telescope (Flickr) \nThe (Unofficial) JWST Exoplanet Dashboard \nJWST facing potential cuts to its operational budget \nStrongest hints yet of biological activity outside the solar system / New Constraints on DMS and DMDS in the Atmosphere of K2-18 b from JWST MIRI – publication
URL:https://www.a3veen.nl/event/unfoldtheuniverse-jwst-james-webb-space-telescope-henrietta-leavitt-teleskop/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20221216
DTEND;VALUE=DATE:20251217
DTSTAMP:20260601T152616
CREATED:20231122T141648Z
LAST-MODIFIED:20231122T141731Z
UID:99037-1671148800-1765929599@www.a3veen.nl
SUMMARY:Surface Water and Ocean Topography (SWOT) mission
DESCRIPTION:The Surface Water and Ocean Topography (SWOT) mission is a satellite altimeter jointly developed and operated by NASA and CNES\, the French space agency\, in partnership with the Canadian Space Agency (CSA) and UK Space Agency (UKSA). \nThe objectives of the mission are to make the first global survey of the Earth’s surface water\, to observe the fine details of the ocean surface topography\, and to measure how terrestrial surface water bodies change over time. While past satellite missions like the Jason series altimeters (TOPEX/Poseidon\, Jason-1\, Jason-2\, Jason-3) have provided variation in river and lake water surface elevations at select locations\, SWOT will provide the first truly global observations of changing water levels\, stream slopes\, and inundation extents in rivers\, lakes\, and floodplains. In the world’s oceans\, SWOT will observe ocean circulation at unprecedented scales of 15–25 km (9.3–15.5 mi)\, approximately an order of magnitude finer than current satellites. Because it uses wide-swath altimetry technology\, SWOT will almost completely observe the world’s oceans and freshwater bodies with repeated high-resolution elevation measurements\, allowing observations of variations. \nLinks:\nSurface Water and Ocean Topography at NASA.gov \nOcean Surface Topography from Space at NASA.gov \nCnes project Library at CNES.fr \nAVISO+ portal for SWOT
URL:https://www.a3veen.nl/event/surface-water-and-ocean-topography-swot-mission/
CATEGORIES:Astronomie,Geografie,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230101
DTEND;VALUE=DATE:20240101
DTSTAMP:20260601T152616
CREATED:20231123T213724Z
LAST-MODIFIED:20240107T204302Z
UID:99114-1672531200-1704067199@www.a3veen.nl
SUMMARY:Wissenschaftsjahr 2023: Das Universum
DESCRIPTION:Im Wissenschaftsjahr 2023 – Unser Universum werfen Wissenschaft\, Politik und Gesellschaft aus vielfältigen Perspektiven einen Blick von der Erde ins All … und wieder zurück. \nVon Ausstellungen über Schulaktionen bis hin zu Mitmachangeboten: Das Wissenschaftsjahr 2023 lädt dabei Jung und Alt zu einem spannenden Austausch mit Wissenschaft und Forschung ein. Es wird sowohl ein Blick auf uralte Menschheitsfragen nach Sinn und Sein geworfen als auch auf aktuelle wissenschaftliche Erkenntnisse der Weltraumforschung\, der Astronomie sowie weiteren Natur- und Geisteswissenschaften. In vielschichtigen Perspektiven entsteht so ein Bogen von den Anfängen des Weltalls bis hin zu den drängendsten Themen unserer Zeit wie dem Klimawandel\, Umweltschutz oder die Erschließung neuer Energiequellen. Disziplinübergreifend und im Verbund verschiedener Forschungsbereiche werden im Wissenschaftsjahr 2023 wichtige Themen rund um das Weltall beleuchtet. \nLinks:\nWissenschaftsjahr 2023: Das Universum
URL:https://www.a3veen.nl/event/wissenschaftsjahr-2023-das-universum/
CATEGORIES:Astronomie,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230413T141500
DTEND;TZID=Europe/Amsterdam:20351213T170000
DTSTAMP:20260601T152616
CREATED:20230730T164118Z
LAST-MODIFIED:20230730T165113Z
UID:92740-1681395300-2081178000@www.a3veen.nl
SUMMARY:JUpiter ICy moons Explorer
DESCRIPTION:The JUpiter ICy moons Explorer (JUICE) is an interplanetary spacecraft in development by the European Space Agency (ESA) with Airbus Defence and Space as the main contractor. \nThe mission will study three of Jupiter‘s Galilean moons: Ganymede\, Callisto\, and Europa\, all of which are thought to have significant bodies of liquid water beneath their surfaces\, making them potentially habitable environments. The mission is not focused on volcanically active Io\, a non-icy moon. The spacecraft launched on 14 April 2023 at 12:14 UTC and will reach Jupiter in July 2031 after four gravity assists and eight years of travel. In December 2034\, the spacecraft will enter orbit around Ganymede for its close up science mission\, becoming the first spacecraft to orbit a moon other than the Moon of Earth. The selection of this mission for the L1 launch slot of ESA’s Cosmic Vision science programme was announced on 2 May 2012. Its period of operations will overlap with NASA‘s Europa Clipper mission\, launching in 2024. \n\n\nNASA’s Juno Is Getting Ever Closer to Jupiter’s Moon Io Links:\nESA’s JUICE \nJuice \nAgenda – JUpiter ICy moons Explorer : launch / Agenda – JUpiter ICy moons Explorer : launch 2nd attempt \nJuice pre-launch press briefing \nHow to follow the Juice launch live
URL:https://www.a3veen.nl/event/jupiter-icy-moons-explorer/
CATEGORIES:Astronomie,Jupiter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230701T171100
DTEND;TZID=Europe/Amsterdam:20290701T171100
DTSTAMP:20260601T152616
CREATED:20230809T130227Z
LAST-MODIFIED:20241120T082444Z
UID:93109-1688231460-1877620260@www.a3veen.nl
SUMMARY:Cosmic Vision : Euclid space telescope / Euclides
DESCRIPTION:Euclid is a visible to near-infrared space telescope developed by the European Space Agency (ESA) and the Euclid Consortium\, the objective of the Euclid mission is to better understand dark energy and dark matter by accurately measuring the acceleration of the universe. \nTo achieve this\, the Korsch-type telescope will measure the shapes of galaxies at varying distances from Earth and investigate the relationship between distance and redshift. Dark energy is generally accepted as contributing to the increased acceleration of the expanding universe\, so understanding this relationship will help to refine how physicists and astrophysicists understand it. Euclid’s mission advances and complements ESA’s Planck telescope (2009 to 2013). The mission is named after the ancient Greek mathematician Euclid. Euclid is a medium-class (“M-class”) mission and is part of the Cosmic Vision campaign of ESA’s Science Programme. This class of missions have an ESA budget cap at around €500 million. Euclid was chosen in October 2011 together with Solar Orbiter\, out of several competing missions. Prior to the Russian invasion of Ukraine\, the launch was scheduled on a Soyuz ST-B in 2023; following the invasion\, Euclid will instead be launched on a Falcon 9 Block 5 on 1 July 2023. \nLinks:\nEuclid \nHow to follow the Euclid launch live \nRuimtetelescoop Euclid wil uitvinden waar het heelal van gemaakt is \nEuclid test images tease of riches to come \nEuclid ‘dark universe’ telescope team will unveil new full-color images today (May 23) \nZoom into the first page of ESA Euclid’s great cosmic atlas \nSpace Warps – ESA Euclid / Euclid Galaxy Zoo – help us classify the shapes of galaxies
URL:https://www.a3veen.nl/event/euclid-space-telescope-euclides/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230712
DTEND;VALUE=DATE:20230913
DTSTAMP:20260601T152616
CREATED:20230912T130236Z
LAST-MODIFIED:20230912T130527Z
UID:94792-1689120000-1694563199@www.a3veen.nl
SUMMARY:Webb Space Telescope’s First Year of Science Celebration
DESCRIPTION:NASA is commemorating the first year of science and discoveries from the agency’s James Webb Space Telescope\, the largest\, most powerful\, and most complex space telescope ever built. \nTo celebrate the anniversary\, multiple events will take place online and live across the U.S. Webb’s first full-color images were released July 12\, 2022\, marking the beginning of the observatory’s science mission. Since then\, Webb has discovered some of the earliest galaxies ever observed\, delivered the most detailed view of the atmospheres of planets outside our solar system\, and captured new views of planets within our solar system. The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system\, looking beyond to distant worlds around other stars\, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners\, ESA (European Space Agency)\, and CSA (Canadian Space Agency). \nLinks:\nJoin NASA to Celebrate Webb Space Telescope’s First Year of Science
URL:https://www.a3veen.nl/event/webb-space-telescopes-first-year-of-science-celebration/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230911T223000
DTEND;TZID=Europe/Amsterdam:20230911T230000
DTSTAMP:20260601T152616
CREATED:20230911T085936Z
LAST-MODIFIED:20230911T090514Z
UID:94703-1694471400-1694473200@www.a3veen.nl
SUMMARY:The Sky at Night : The Very Large Telescope (TV BBC Four)
DESCRIPTION:The Sky at Night is a monthly documentary television programme on astronomy produced by the BBC. \nThe show had the same permanent presenter\, Patrick Moore\, from its first broadcast on 24 April 1957 until 7 January 2013. The latter date was a posthumous broadcast\, which followed Moore’s death on 9 December 2012. This made it the longest-running programme with the same presenter in television history. Many early episodes are missing\, either because the tapes were wiped\, thrown out\, or because the episode was broadcast live and never recorded in the first place. Beginning with the 3 February 2013 edition\, the show was co-presented by Lucie Green and Chris Lintott. Since December 2013 Maggie Aderin-Pocock has been a presenter. The programme’s opening and closing theme music is “At the Castle Gate”\, from the incidental music to Pelléas et Mélisande\, written in 1905 by Jean Sibelius\, performed by the Royal Philharmonic Orchestra and conducted by Sir Thomas Beecham. \nThis episode:\nThe Very Large Telescope – or VLT – has been responsible for some of the greatest astronomical breakthroughs of all time\, discoveries that have resulted in Nobel Prizes and transformed our understanding of the cosmos. The Sky at Night team travels to the heart of Chile’s Atacama Desert to explore one of the most advanced observatories in the world – a site at the forefront of ground-based optical astronomy. \nThe Very Large Telescope\, or VLT\, is located at the Paranal Observatory\, in the Atacama Desert\, one of the driest places on earth apart from the North and South Poles\, which makes it the perfect place for an observatory because there is little moisture in the air distorting the view of the stars. \nThe VLT is actually made up of four main telescopes that can be used individually or have their observing power combined. Each telescope contains a huge 8.2 metre mirror at its heart\, designed to capture as much light as possible\, and the images obtained from the ground are almost as sharp as those obtained in space. \nIn this episode\, Maggie meets some of the scientists\, engineers and astronomers working at this extraordinary site. Her journey begins by meeting the head of maintenance\, support and engineering\, Maxime Boccas. He is leading the operation of something that only happens once every two years – the cleaning of the mirrors. Maxime explains the incredible way these huge and delicate mirrors are cleaned and maintained – including the way aluminium particles are vaporised to create perfectly reflective surfaces. \nSomeone using the incredible telescopes for their work is astronomer Dr Joe Anderson. Along with other scientists\, Joe uses the VLT’s specialised instruments – devices that analyse light from the universe\, helping scientists to see and better understand the cosmos. Joe explains that the VLT is the world’s most advanced visible-light astronomical observatory\, and its huge mirrors and range of instruments mean astronomers can get readings across a broad range of spectrums\, which has led to a lot of new discoveries regarding exoplanets\, black holes and gamma ray bursts. \nThe VLT is a huge site in the middle of a desert\, so Maggie next meets Vanessa Peidro\, the head of logistics and responsible for maintaining not just the buildings and vehicles but also managing food\, water and other facilities that cater for 150-160 people on site at any one time. \nMaggie then meets physicist Francoise Delplancke-Stroebele and her colleague Frederic Gonte. They are leading the VLT’s next upgrade\, Gravity+\, and explain how the four massive telescopes at the VLT work in unison by combining light waves in a technique called interferometry. This technique is used by astronomer Dr Abigail Frost\, who explains how interferometry helped in the recent discovery of a rare so-called ‘vampire star’. \nThe VLT is still a world-class observatory with cutting-edge research\, but the site will soon transform into an even more powerful observatory. The Extremely Large Telescope\, or ELT\, is currently in construction. Maggie gets a sneak peek at what will be\, when it’s completed in five years’ time\, the biggest optical telescope in the world. Built on top of a mountain and the size of a cathedral\, the ELT has to be one of the most spectacular and complex feats of engineering in the world. \nLinks:\nThe Sky at Night
URL:https://www.a3veen.nl/event/the-sky-at-night-the-very-large-telescope-tv-bbc-four/
CATEGORIES:Astronomie,Cultuur,TV
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230914
DTEND;VALUE=DATE:20230915
DTSTAMP:20260601T152616
CREATED:20230914T200133Z
LAST-MODIFIED:20251114T145924Z
UID:94954-1694649600-1694735999@www.a3veen.nl
SUMMARY:NASA : UAP Independent Study Team - Final Report - publication
DESCRIPTION:On September 14\, 2023\, the NASA Unidentified Anomalous Phenomena Independent Study Team published its final report containing a series of recommendations for how the agency could help to move our understanding of UAP forward. \nLinks:\nNASA Unidentified Anomalous Phenomena Independent Study \nNASA Shares Unidentified Anomalous Phenomena Independent Study Report
URL:https://www.a3veen.nl/event/nasa-uap-independent-study-team-final-report-publication/
CATEGORIES:Astronomie,UAP/UFO
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231001
DTEND;VALUE=DATE:20231002
DTSTAMP:20260601T152616
CREATED:20231029T145415Z
LAST-MODIFIED:20231029T162930Z
UID:97679-1696118400-1696204799@www.a3veen.nl
SUMMARY:Study finds the Universe is a black hole (kind of) / All objects and some questions - publication
DESCRIPTION:The paper ‘All objects and some questions‘ presents an overview of the thermal history of the Universe and the sequence of objects (e.g.\, protons\, planets\, and galaxies) that condensed out of the background as the Universe expanded and cooled. \nThe authors plot the density and temperature of the Universe as a function of time and the masses and sizes of all objects in the Universe. These comprehensive pedagogical plots draw attention to the triangular regions forbidden by general relativity and quantum uncertainty and help navigate the relationship between gravity and quantum mechanics. How can we interpret their intersection at the smallest possible objects: Planck-mass black holes (“instantons”)? Does their Planck density and Planck temperature make them good candidates for the initial conditions of the Universe? Our plot of all objects also seems to suggest that the Universe is a black hole. The writers explain how this depends on the unlikely assumption that our Universe is surrounded by zero density Minkowski space. \nLinks:\nStudy finds the Universe is a black hole (kind of)
URL:https://www.a3veen.nl/event/all-objects-and-some-questions-publication/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231001
DTEND;VALUE=DATE:20250101
DTSTAMP:20260601T152616
CREATED:20230812T235221Z
LAST-MODIFIED:20231012T115731Z
UID:93378-1696118400-1735689599@www.a3veen.nl
SUMMARY:Heliophysics Big Year
DESCRIPTION:The Heliophysics Big Year is a global celebration of solar science and the Sun’s influence on Earth and the entire solar system. \nDuring the Heliophysics Big Year\, you will have the opportunity to participate in many solar science events such as watching solar eclipses\, experiencing an aurora\, participating in citizen science projects\, and other fun Sun-related activities. Heliophysics is the study of our star and how it interacts with everything in our solar system. The “Big Year” is a concept that originated with citizen scientists in the bird-watching community. During their Big Year\, birders attempt to observe and study as many bird species as possible during a calendar year\, and we are challenging you to do the same with our Sun. \nLinks:\nThe Heliophysics Big Year \nBig Year
URL:https://www.a3veen.nl/event/heliophysics-big-year/
CATEGORIES:Astronomie,Zon
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231002
DTEND;VALUE=DATE:20231007
DTSTAMP:20260601T152616
CREATED:20230917T175728Z
LAST-MODIFIED:20231002T073636Z
UID:95118-1696204800-1696636799@www.a3veen.nl
SUMMARY:International Astronautical Congress 2023
DESCRIPTION:Every year\, the International Astronautical Federation with the support of the International Academy of Astronautics and the International Institute of Space Law (IISL)\, holds the International Astronautical Congress (IAC) which is hosted by one of the national society members of the IAF. \nThey are an annual meeting of the actors in the discipline of space\, and are generally held in late September or early October. They consist of plenary sessions\, lectures and meetings. The IAC is attended by the agency heads and senior executives of the world’s space agencies. As the Second World War came to an end\, the United States and the Soviet Union held different and competing political worldviews. As the Cold War began to take shape\, communication between the two countries became less frequent. \nBoth countries turned their focus to achieving military superiority over the other. Six years after the Iron Curtain fell\, the International Astronautical Federation (IAF) was formed by scientists from all over Europe in the field of space research in order to collaborate once more. During the years of the Space Race\, the IAF was one of the few forums where members of both East and West Europe could meet during the annual International Astronautical Congresses. \nLinks:\nInternational Astronautical Congress
URL:https://www.a3veen.nl/event/international-astronautical-congress-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231004
DTEND;VALUE=DATE:20231005
DTSTAMP:20260601T152616
CREATED:20231004T090925Z
LAST-MODIFIED:20231004T091047Z
UID:96022-1696377600-1696463999@www.a3veen.nl
SUMMARY:Spoetnik 1 lancering (1957) 2023
DESCRIPTION:Spoetnik 1 of PS-1 werd gelanceerd op 4 oktober 1957 om 22 u 48 minuten en 34 seconden\, dat moment wordt vaak gezien als de officiële start van het ruimtevaarttijdperk. \nDe Spoetnik 1 bestond uit een uiterst eenvoudig concept: een aluminium bol (gewicht 83\,6 kilogram; doormeter 58\,5 cm) met daarin een accu\, een ventilator voor de temperatuurregeling. Verder twee radiozenders (met radiobuizen in plaats van transistoren) met aan de buitenzijde vier ongeveer 3 m lange sprietvormige antennes. \nLinks:\nSputnik 1\, Earth’s First Artificial Satellite in Photos
URL:https://www.a3veen.nl/event/spoetnik-1-lancering-1957-2023/
LOCATION:Bajkonoer\, Kazachstan
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231004
DTEND;VALUE=DATE:20231011
DTSTAMP:20260601T152616
CREATED:20231004T085855Z
LAST-MODIFIED:20231004T090517Z
UID:96018-1696377600-1696982399@www.a3veen.nl
SUMMARY:World Space Week 2023
DESCRIPTION:World Space Week (WSW) is an annual holiday observed in over 90 nations throughout the world. \nThe General Assembly of the United Nations (UN) declared 4 to 10 October WSW in order to celebrate each year at the international level the contributions of space science and technology to the betterment of the human condition. 4 October 1957 was the date of the launch into outer space of the first human-made Earth satellite\, Sputnik 1\, thus opening the way for space exploration\, and the 10th of October 1967 was the date of the entry into force of the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space\, including the Moon and Other Celestial Bodies. \nSpace science and technology and their applications are increasingly being used to support a wide range of United Nations activities. At least 25 United Nations entities and the World Bank Group routinely use space applications. They make important and sometimes essential contributions to the work of the United Nations\, including in the implementation of recommendations of major world conferences and those of the Third United Nations Conference on the Exploration and Peaceful Uses of Outer Space (UNISPACE III)\, and in efforts towards sustainable development. \nAs a consequence\, coordination\, cooperation and synergy are essential for those activities to be effectively carried out by the United Nations system. The annual sessions of the Inter-Agency Meeting on Outer Space Activities are the main means of achieving that synergy. The effectiveness of the Meeting has been further enhanced by the holding\, since 2004\, of an open informal session immediately after the end of the Meeting\, as a means of engaging Member States\, in a direct and informal setting\, in important space-related developments in the United Nations system. The agenda of the Inter-Agency Meeting is reviewed at each session and adapted to current operational needs. \nLinks:\nWorld Space Week \nWorld Space Week 4-10 October
URL:https://www.a3veen.nl/event/world-space-week-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231005T220000
DTEND;TZID=Europe/Amsterdam:20231006T070000
DTSTAMP:20260601T152616
CREATED:20231005T195356Z
LAST-MODIFIED:20231022T000012Z
UID:96166-1696543200-1696575600@www.a3veen.nl
SUMMARY:Edwin Hubble identifies Cepheid variable star - 100 years ago
DESCRIPTION:Edwin Hubble proved that many objects previously thought to be clouds of dust and gas and classified as “nebulae” were actually galaxies beyond the Milky Way. \nEdwin Hubble’s arrival at Mount Wilson Observatory\, California\, in 1919 coincided roughly with the completion of the 100-inch (2.5 m) Hooker Telescope\, then the world’s largest. At that time\, the prevailing view of the cosmos was that the universe consisted entirely of the Milky Way Galaxy. Using the Hooker Telescope at Mount Wilson\, Hubble identified Cepheid variables\, a standard candle discovered in 1908 by Henrietta Leavitt. Comparing their apparent luminosity to their intrinsic luminosity gives their distance from Earth. Hubble found Cepheids in several nebulae\, including the Andromeda Nebula and Triangulum Nebula. \nHis observations\, made in 1923\, proved conclusively that these nebulae were much too distant to be part of the Milky Way and were\, in fact\, entire galaxies outside our own; thus today they are no longer considered nebulae. This was first hypothesized as early as 1755 when Immanuel Kant‘s General History of Nature and Theory of the Heavens appeared. This hypothesis was opposed by many in the astronomy establishment of the time\, in particular by Harvard University–based Harlow Shapley. Despite the opposition\, Hubble\, then a thirty-five-year-old scientist\, had his findings first published in The New York Times on November 23\, 1924\, then presented them to other astronomers at the January 1\, 1925\, meeting of the American Astronomical Society. Hubble’s results for Andromeda were not formally published in a peer-reviewed scientific journal until 1929. \nLinks:\nEdwin Hubble identifies Cepheid variable star \nAgenda – Edwin Hubble identifies Cepheid variable star \nOn the α/Fe bimodality of the M31 disks \nDESI Observations of the Andromeda Galaxy: Revealing the Immigration History of our Nearest Neighbor \nhttps://iopscience.iop.org/article/10… \nhttps://jwstfeed.com/Home/ShowFeed?se… \nhttps://webbtelescope.org/contents/me…
URL:https://www.a3veen.nl/event/edwin-hubble-identifies-cepheid-variable-star-100-years-ago/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231007T080000
DTEND;TZID=Europe/Amsterdam:20231008T170000
DTSTAMP:20260601T152616
CREATED:20231008T152637Z
LAST-MODIFIED:20231008T152741Z
UID:96279-1696665600-1696784400@www.a3veen.nl
SUMMARY:ESA Open Days 2023
DESCRIPTION:ESA Open Days 2023 is an Europe-wide series of events promises to connect space enthusiasts\, bringing space closer to them than ever before. \nUnforgettable days of discoveries\, inspiration\, and scientific divulgation await thousands of European citizens\, who are eagerly gearing up for a fantastic journey through the wonders of space. \nLinks:\nESA Open Days 2023
URL:https://www.a3veen.nl/event/esa-open-days-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231008T180000
DTEND;TZID=Europe/Amsterdam:20231009T090000
DTSTAMP:20260601T152616
CREATED:20231008T150215Z
LAST-MODIFIED:20231008T150251Z
UID:96264-1696788000-1696842000@www.a3veen.nl
SUMMARY:De meteorenzwerm Draconiden in oktober 2023
DESCRIPTION:De meteorenzwerm Draconiden bereikt op maandag 9 oktober 2023\, rond 09:00\, zijn maximum. \nZelfs wanneer de radiant in het zenit zou staan\, zou er van deze zwerm naar verwachting gemiddeld niet meer dan één meteoor per uur vallen. Rond 18:00 staat de radiant van de zwerm in het hoogste punt (op 88°) aan de hemel. Het beste moment om Draconiden waar te nemen is op 8 oktober rond 21:00. De radiant van de zwerm staat dan ongeveer 63° boven de westnoordwestelijke horizon. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 9–15 meteoren per uur zichtbaar. Op een goed donkere plek zijn circa vier keer zoveel meteoren te zien als in dichtbevolkt gebied. De Maan komt om 01:29 op\, is voor ongeveer 30% verlicht en kan eventueel storen. Rond 07:15 gaat het schemeren en om 07:53 komt de Zon op. \nLinks:\nDe meteorenzwerm Draconiden in oktober 2023
URL:https://www.a3veen.nl/event/de-meteorenzwerm-draconiden-in-oktober-2023/
CATEGORIES:Astronomie,Meteoren
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231009T200000
DTEND;TZID=Europe/Amsterdam:20231009T213000
DTSTAMP:20260601T152616
CREATED:20230929T112459Z
LAST-MODIFIED:20230929T112708Z
UID:95778-1696881600-1696887000@www.a3veen.nl
SUMMARY:Modelling the cosmos (TV webcast)
DESCRIPTION:Join world-renowned physicist Claudia Maraston and dive into the world of Stellar Population Models. \nThese models observe the spectro-photometric and mass properties of galaxies\, and have found widespread applications in astrophysics and cosmology\, providing us with the tools to study galaxy formation and evolution both theoretically and through data interpretation. Claudia will explore how Stellar Population Models are developed\, using leading-edge techniques to predict the properties of stars and their evolution over time. You’ll discover how these models are used to study the formation and evolution of galaxies\, shedding light on the mysteries of the Universe and its origins. Whether you’re an astrophysics enthusiast or just curious\, this talk promises to be a fascinating journey through one of the most exciting fields in modern science. So\, join us as we unravel the secrets of the cosmos and explore the frontiers of our understanding of the Universe. Livestream audience: pay what you can. \nLinks:\nModelling the cosmos
URL:https://www.a3veen.nl/event/modelling-the-cosmos-tv-webcast/
LOCATION:The Royal Institution of Great Britain\, 21 Albemarle Street\, London\, Verenigd Koninkrijk
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231009T230000
DTEND;TZID=Europe/Amsterdam:20231009T235800
DTSTAMP:20260601T152616
CREATED:20231009T083131Z
LAST-MODIFIED:20231012T200715Z
UID:96323-1696892400-1696895880@www.a3veen.nl
SUMMARY:The Sky at Night : Question Time Special - (TV BBC Four)
DESCRIPTION:The Sky at Night is a monthly documentary television programme on astronomy produced by the BBC. \nThe show had the same permanent presenter\, Patrick Moore\, from its first broadcast on 24 April 1957 until 7 January 2013. The latter date was a posthumous broadcast\, which followed Moore’s death on 9 December 2012. This made it the longest-running programme with the same presenter in television history. Many early episodes are missing\, either because the tapes were wiped\, thrown out\, or because the episode was broadcast live and never recorded in the first place. \nBeginning with the 3 February 2013 edition\, the show was co-presented by Lucie Green and Chris Lintott. Since December 2013 Maggie Aderin-Pocock has been a presenter. The programme’s opening and closing theme music is “At the Castle Gate”\, from the incidental music to Pelléas et Mélisande\, written in 1905 by Jean Sibelius\, performed by the Royal Philharmonic Orchestra and conducted by Sir Thomas Beecham. \nThis episode:\nA special Question Time edition of the programme\, recorded at the University of Exeter as part of the British Science Association’s Science Festival. The panel is chaired by science journalist Dallas Campbell and made up of The Sky at Night presenters Chris Lintott\, Maggie Aderin-Pocock and Pete Lawrence\, who are joined on stage by Dr Claire Davies\, who studies star and planet formation\, and Dr Hannah Wakeford\, who specialises in the atmospheres of exoplanets. The panel answer questions covering all things astronomical from The Sky at Night’s avid viewers and from audience members. We also hear about updates from the Voyager missions to life on other planets and discover where the panel would want to send future space probes if they had the chance. \nLinks:\nThe Sky at Night
URL:https://www.a3veen.nl/event/the-sky-at-night-question-time-special-tv-bbc-four-20231009/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231014T145500
DTEND;TZID=Europe/Amsterdam:20231014T205500
DTSTAMP:20260601T152616
CREATED:20231014T142656Z
LAST-MODIFIED:20231025T094249Z
UID:96736-1697295300-1697316900@www.a3veen.nl
SUMMARY:Zonsverduistering van 14 oktober 2023
DESCRIPTION:De zonsverduistering van 14 oktober 2023 betreft een ringvormige zonsverduistering die te zien is in Noord- en Zuid-Amerika\, de Stille Oceaan en zeer beperkt in het uiterste westen van Afrika. \nHet gebied waar een ringvormige eclips kan worden waargenomen\, gaat door de landen de Verenigde Staten\, Mexico\, Guatemala\, Belize\, Honduras\, Nicaragua\, Panama\, Colombia en Brazilië. In de Benelux vindt geen zonsverduistering plaats\, doordat de Maan 0\,6° ten zuiden langs de Zon beweegt. Een zonsverduistering (of zoneclips) is een astronomisch fenomeen\, waarbij overdag het licht van de Zon de waarnemer niet bereikt\, doordat een hemellichaam (meestal de Maan) in de weg van het licht staat. Een zonsverduistering is een voor mensen op aarde direct waarneembaar astronomisch fenomeen\, waarbij het in feite niet de zon\, maar een gedeelte van de Aarde is dat verduisterd wordt. Een waarnemer ziet dat de Zon bedekt wordt door de maan en dat een donker gebied met grote snelheid (de resultante van de baansnelheid van de Maan en de draaiing van de Aarde) op hem af komt. Als dat gebied (de kernschaduw) hem bereikt heeft\, is de totale zonsverduistering begonnen. Voor astronomen biedt een totale zonsverduistering een unieke kans om de corona\, de lichtkrans om de zon te bestuderen. Deze bevat bijvoorbeeld vaak zichtbare zonnevlammen. De verduistering maakt deel uit van de Saros 124 zonsverduisteringserie. \n\nLinks:\nOverzicht van alle eclipsen door NASA \nThe HamSCI Festivals of Eclipse Ionospheric Science will occur October 14\, 2023 and April 8\, 2024 during spectacular North American solar eclipses
URL:https://www.a3veen.nl/event/zonsverduistering-van-14-oktober-2023/
CATEGORIES:Astronomie,Zon
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231020T020000
DTEND;TZID=Europe/Amsterdam:20231020T081200
DTSTAMP:20260601T152616
CREATED:20231019T123927Z
LAST-MODIFIED:20231019T123938Z
UID:97028-1697767200-1697789520@www.a3veen.nl
SUMMARY:De meteorenzwerm ε-Geminiden in oktober 2023
DESCRIPTION:De meteorenzwerm ε-Geminiden bereikt op vrijdag 20 oktober 2023\, rond 02:00\, zijn maximum. \nZelfs wanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld slechts zo’n 3 meteoren per uur vallen. Rond 06:30 staat de radiant van de zwerm in het hoogste punt (op 64°) aan de hemel. Bij ons zijn ieder uur vermoedelijk ongeveer 2 meteoren zichtbaar van deze zwerm. In totaal zijn er\, door meteoren van andere zwermen en sporadische meteoren\, bij donkere en heldere hemel circa 17–27 “vallende sterren” per uur te zien. Op een donkere locatie zijn circa twee keer zoveel meteoren zichtbaar als in een grote stad. De Maan stoort niet. Rond 07:45 gaat het schemeren en om 08:12 komt de Zon op. Over het algemeen zijn de de meteoren van een zwerm niet alleen op de dag van het maximum zichtbaar. Zo is gedurende circa 15 dagen rondom het maximum meer dan 50% van het maximale aantal meteoren (1 per uur) van de ε-Geminiden te zien. De zwerm heeft daarmee een vrij lange piek.  De snelheden van de meteoren van de ε-Geminiden zijn behoorlijk hoog: zo’n 69 km/s\, dat is circa 248.040 km/uur. \nLinks:\nDe meteorenzwerm ε-Geminiden in oktober 2023
URL:https://www.a3veen.nl/event/de-meteorenzwerm-%ce%b5-geminiden-in-oktober-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231022T010000
DTEND;TZID=Europe/Amsterdam:20231022T090000
DTSTAMP:20260601T152616
CREATED:20230824T163227Z
LAST-MODIFIED:20240912T085020Z
UID:93865-1697936400-1697965200@www.a3veen.nl
SUMMARY:Observe the Moon Night 2023
DESCRIPTION:International Observe the Moon Night is an annual public outreach event sponsored by the Lunar Reconnaissance Orbiter mission\, the Solar System Exploration Division at NASA’s Goddard Space Flight Center\, and other NASA and astronomical organizations that encourages observation\, appreciation\, and understanding of the Moon and its connection to planetary science and exploration. \nEveryone on Earth is invited to join the celebration by hosting or attending an event or participating as a lunar observer — and uniting on one day each year to look at and learn about the Moon together. First organized in 2010\, there are usually over 500 events annually in over 40 countries\, hosted by universities\, observatories\, NASA Centers\, schools\, museums\, parks\, libraries\, and amateur astronomers. Some events are offered both in person and via internet streaming video. The date is selected to enhance visibility of lunar topography. \nLinks:\nObserve the Moon Night 2023
URL:https://www.a3veen.nl/event/observe-the-moon-night-2023/
CATEGORIES:Astronomie,Maan
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231022T080000
DTEND;TZID=Europe/Amsterdam:20231022T170000
DTSTAMP:20260601T152616
CREATED:20231022T134654Z
LAST-MODIFIED:20231022T134948Z
UID:97197-1697961600-1697994000@www.a3veen.nl
SUMMARY:De meteorenzwerm Leo Minoriden in oktober 2023
DESCRIPTION:De meteorenzwerm Leo Minoriden bereikt op maandag 23 oktober 2023\, rond 02:00\, zijn maximum. \nZelfs wanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld slechts zo’n 3 meteoren per uur vallen. Rond 10:30 staat de radiant van de zwerm in het hoogste punt (op 75°) aan de hemel. Het beste moment om Leo Minoriden waar te nemen is op 23 oktober rond 06:15. De radiant van de zwerm staat dan ongeveer 46° boven de horizon\, in het oosten. In onze streken zijn dan vermoedelijk circa 0–3 meteoren per uur van deze zwerm te zien. In totaal zijn er\, door meteoren van andere zwermen en sporadische meteoren\, bij donkere en heldere hemel circa 22–33 “vallende sterren” per uur te zien. Op een goed donkere plek zijn meer dan twee keer zoveel meteoren zichtbaar als in een grote stad. \nDe Maan is voor ongeveer 60% verlicht\, maar gaat om 00:17 onder. Rond 07:45 gaat het schemeren en om 08:18 komt de Zon op. Over het algemeen zijn de de meteoren van een zwerm niet alleen op de dag van het maximum zichtbaar. Zo is gedurende circa 4 dagen rondom het maximum ruim de helft van het maximum aantal meteoren per uur van de Leo Minoriden te zien. De zwerm heeft daarmee een relatief korte piek. Probeer dus ook enkele nachten voor en na het maximum meteoren waar te nemen. Wel is iedere dag die je eerder voor het maximum\, of later na het maximum waarneemt het aantal meteoren dat zichtbaar is circa 30% kleiner. De typische snelheden van de meteoren in deze zwerm zijn met circa 62 km/s (ongeveer 222.480 km/uur) relatief hoog. \nLinks:\nDe meteorenzwerm Leo Minoriden in oktober 2023
URL:https://www.a3veen.nl/event/de-meteorenzwerm-leo-minoriden-in-oktober-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231026T163800
DTEND;TZID=Europe/Amsterdam:20231026T170000
DTSTAMP:20260601T152616
CREATED:20231026T104311Z
LAST-MODIFIED:20231026T104609Z
UID:97516-1698338280-1698339600@www.a3veen.nl
SUMMARY:Komeet 321P/SOHO in 2023 - perihelium
DESCRIPTION:De komeet 321P/SOHO bereikt het perihelium op 26 oktober 2023\, deze periodieke komeet heeft een sterk elliptische baan met een omlooptijd van circa 3.8 jaar. \nDe komeet bevindt zich tijdens het perihelium op een afstand van slechts 0\,05 AE van de Zon en op 0\,97 AE van de Aarde. De helderheid van het object bedraagt dan magnitude +6\,1. Bedenk hierbij dat het lastig is de helderheid van een komeet exact te voorspellen. Daarnaast is een komeet vaak onzichtbaar rond het moment van grootste helderheid\, doordat deze zich dan te dicht bij de Zon aan de hemel bevindt. Deze komeet is in België en Nederland niet of nauwelijks zichtbaar bij een helderheid groter dan achtste magnitude. \nLinks:\nKomeet 321P/SOHO in 2023
URL:https://www.a3veen.nl/event/komeet-321p-soho-in-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231028T200100
DTEND;TZID=Europe/Amsterdam:20231029T002900
DTSTAMP:20260601T152616
CREATED:20231028T175539Z
LAST-MODIFIED:20231028T182754Z
UID:97651-1698523260-1698539340@www.a3veen.nl
SUMMARY:Gedeeltelijke maansverduistering op 28/29 oktober 2023
DESCRIPTION:In de nacht van zaterdag 28 op zondag 29 oktober 2023 vindt een gedeeltelijke maansverduistering plaats. \nDe Maan beweegt zich dan door de schaduw van de Aarde\, zodat er op een deel van het maanoppervlak geen direct zonlicht meer valt en het lijkt alsof er een hap uit de Maan is genomen. De eclips is in zijn geheel zichtbaar vanuit Nederland en België. De verduistering heeft een grootte van slechts 0.13 in de kernschaduw. De eclips begint om 20:01 uur en staat bij het maximum\, om 22:15\, op een hoogte van circa 36° (in Utrecht). De eclips eindigt om 00:29. Deze maansverduistering is niet bijzonder indrukwekkend\, omdat de Maan de kernschaduw nauwelijks raakt\, waardoor het maanoppervlak minimaal verduisterd is (bijna overal op de zichtbare zijde van de Maan valt nog tenminste een beetje zonlicht). Tijdens het maximum is echter duidelijk een klein “hapje” uit de Maan genomen. De rest van de Maan bevindt zich op dat moment in de bijschaduw\, en op die plaatsen van het maanoppervlak valt nog tenminste een beetje zonlicht. \nLinks:\nGedeeltelijke maansverduistering op 28/29 oktober 2023
URL:https://www.a3veen.nl/event/gedeeltelijke-maansverduistering-op-28-29-oktober-2023/
CATEGORIES:Astronomie,Maan
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231105T080000
DTEND;TZID=Europe/Amsterdam:20231105T170000
DTSTAMP:20260601T152616
CREATED:20231105T132940Z
LAST-MODIFIED:20231105T132940Z
UID:98117-1699171200-1699203600@www.a3veen.nl
SUMMARY:Meteorenzwerm Oktober-Arietiden in november 2023
DESCRIPTION:De meteorenzwerm Oktober-Arietiden bereikt op zondag 5 november 2023\, rond 02:00\, zijn maximum. \nWanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 5 meteoren per uur vallen. Rond 0:30 uur staat de radiant van de zwerm in het hoogste punt (op 52°) aan de hemel. Het beste moment om Oktober-Arietiden waar te nemen is op 5 november rond 23:15. De radiant staat op dat moment zo’n 50° boven de horizon\, in het zuidzuidoosten. Doordat de omstandigheden niet ideaal zijn\, zijn er bij ons dan ieder uur naar schatting slechts ongeveer 1–4 meteoren van deze zwerm zichtbaar. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 9–16 “vallende sterren” per uur te zien. Op een goed donkere plek zijn ongeveer vier keer zoveel meteoren te zien als in dichtbevolkt gebied. De Maan komt al voor middernacht op\, is voor ongeveer 45% verlicht en kan eventueel storen. \nRond 07:00 gaat het schemeren en om 07:43 komt de Zon op. Over het algemeen zijn de de meteoren van een zwerm niet alleen op de dag van het maximum zichtbaar. Zo is gedurende circa 10 dagen rondom het maximum meer dan de helft van het maximale aantal meteoren (1 per uur) van de Oktober-Arietiden te zien. Tot 8 dagen voor en na het maximum zijn nog meteoren van deze zwerm te herkennen. Probeer dus ook enkele nachten voor en na het maximum meteoren waar te nemen. Wel is iedere dag die je eerder voor het maximum\, of later na het maximum waarneemt het aantal meteoren dat zichtbaar is circa 10% kleiner. De typische snelheden van de meteoren in deze zwerm zijn met circa 30 km/s (ongeveer 108.000 km/uur) vrij gemiddeld. Meteoren waarnemen kan zonder speciale instrumenten. Wanneer het helder is\, volstaat het blote oog. Op een donkere plek zijn meer meteoren te zien dan midden in een stad. \nLinks:
URL:https://www.a3veen.nl/event/meteorenzwerm-oktober-arietiden-in-november-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231113T230000
DTEND;TZID=Europe/Amsterdam:20231113T233000
DTSTAMP:20260601T152616
CREATED:20231113T113109Z
LAST-MODIFIED:20231113T142952Z
UID:98484-1699916400-1699918200@www.a3veen.nl
SUMMARY:The Sky at Night - The Sky at Night Meets The Infinite Monkey Cage (TV BBC Four)
DESCRIPTION:The Sky at Night is a monthly documentary television programme on astronomy produced by the BBC. \nThe show had the same permanent presenter\, Patrick Moore\, from its first broadcast on 24 April 1957 until 7 January 2013. The latter date was a posthumous broadcast\, which followed Moore’s death on 9 December 2012. This made it the longest-running programme with the same presenter in television history. Many early episodes are missing\, either because the tapes were wiped\, thrown out\, or because the episode was broadcast live and never recorded in the first place. \nBeginning with the 3 February 2013 edition\, the show was co-presented by Lucie Green and Chris Lintott. Since December 2013 Maggie Aderin-Pocock has been a presenter. The programme’s opening and closing theme music is “At the Castle Gate”\, from the incidental music to Pelléas et Mélisande\, written in 1905 by Jean Sibelius\, performed by the Royal Philharmonic Orchestra and conducted by Sir Thomas Beecham. \nThis episode:\nIn this special episode to mark the end of another season of The Sky at Night\, we team up with BBC Radio 4’s The Infinite Monkey Cage to talk all things amateur astronomy. Join Maggie\, Chris and Pete\, alongside Professor Brian Cox and comedians Robin Ince and Dara Ó Briain\, in front of a live audience at the BBC’s Radio Theatre. Together they discuss their love of stargazing and share their top tips and favourite kit for looking up at the night sky. \nOutside the Radio Theatre\, Pete hosts a Star Party. He joins fellow amateur astronomers hoping to get views of the Moon\, as well as the giant planets Saturn and Jupiter\, using binoculars\, telescopes – and the naked eye. But will the clouds part for long enough? \nWe look back at 66 years of stargazing – and cloudy skies – with The Sky at Night\, including some very familiar\, but much younger\, faces. And of course\, Sir Patrick Moore. \nPete invites Professor Leigh Fletcher from the University of Leicester to the Star Party. Leigh explains how images from amateur astronomers on Earth have been used to direct the camera onboard Nasa’s Juno mission to Jupiter. And amateurs are playing a critical role in processing the data and images sent back from this gas giant. \nAnd Dr George Dransfield meets Dr Martin Archer from Imperial College London to discover how we can get involved with space science – even when it’s cloudy. Martin is involved in a Nasa project called Harp\, which is asking citizen scientists to listen to outer space. Martin took inspiration from his previous career as a radio DJ to convert plasma waves that travel through space into sound waves. By analysing these sound waves\, we can help scientists work out the impact these plasma waves might have on us here on Earth. \nLinks:\nThe Sky at Night \nThe Infinite Monkey Cage – The Monkeys meet The Sky At Night
URL:https://www.a3veen.nl/event/the-sky-at-night-the-sky-at-night-meets-the-infinite-monkey-cage-tv-bbc-four/
CATEGORIES:Astronomie,Cultuur,TV
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231115
DTEND;VALUE=DATE:20231116
DTSTAMP:20260601T152616
CREATED:20231117T085802Z
LAST-MODIFIED:20231117T112626Z
UID:98701-1700006400-1700092799@www.a3veen.nl
SUMMARY:WASP-107b / SO2\, silicate clouds\, but no CH4 detected in a warm Neptune - publication
DESCRIPTION:WASP-107b is a super-Neptune exoplanet that orbits the star WASP-107. It lies 200 light-years away from Earth in the constellation Virgo\, its discovery was announced in 2017 by a team led by D. R. Anderson via the WASP-South. \nWASP-107b could not have formed in its current orbit. It likely migrated inward from its birth orbit beyond 1 AU due to interaction with the heavier planet WASP-107c. WASP-107b is in a retrograde orbit\, strongly misaligned with the equatorial plane of the parent star. The misalignment angle is equal to 118°+38 −19. WASP-107c follows a highly eccentric and inclined orbit with a period of 1088+15 −16 days. WASP-107b is a super-Neptune ice giant exoplanet located 200 light years away from Earth in the constellation Virgo. It is roughly the size of Jupiter but less than one-tenth of Jupiter’s mass\, making it one of the lowest density exoplanets. Its radius is 0.96±0.03 times Jupiter’s\, making its atmosphere fluffy\, and coupled with transiting a moderately bright K-type star\, makes it a target for atmospheric characterization. It is eight times nearer to its star than Mercury is to the Sun and orbits its star every 5.7 days. With a temperature of 773K / 500 °C\, its atmosphere makes it one of the hottest known exoplanets. Helium was discovered in the planet’s atmosphere in 2018\, making it the first time helium was discovered on an exoplanet. A follow-up observation with Keck in 2020 showed that the helium absorption extends beyond transit-egress. Extreme ultraviolet radiation from the host star is gradually whittling down the planet’s atmosphere\, forming a comet-like tail 7 times as long as the radius of the planet. \nA transmission spectrum of the warm Neptune exoplanet WASP-107b\, captured by the Low Resolution Spectrometer (LRS) of the Mid InfraRed Instrument (MIRI) on board JWST\, reveals evidence for water vapor\, sulfur dioxide\, and silicate (sand) clouds in the planet’s atmosphere. Credit: Michiel Min / European MIRI EXO GTO team / ESA / NASA\nWhile the James Webb Space Telescope (JWST or Webb) may spend a lot of its time observing the farthest reaches of the early universe when galaxies were only just starting to form\, it also spends plenty of its time focused on objects a lot closer to home — such as the atmospheres of exoplanets in our galactic neighborhood. A team of European astronomers\, co-led by researchers from the KU Leuven Institute of Astronomy\, used observations from the JWST to detail the atmospheric composition of the exoplanet WASP-107b. The researchers found water vapor\, sulfur dioxide and even silicate sand clouds residing within the exoplanet’s dynamic atmosphere. The study ‘SO2\, silicate clouds\, but no CH4 detected in a warm Neptune‘ may also have implications for our understanding of the chemistry of distant planets. \n \n\nLinks:\nJames Webb Space Telescope reveals sandy surprise in distant planet \nOp ‘suikerspinplaneet’ WASP-107b blijkt het ook te regenen\, alleen valt daarbij geen water\, maar zand uit de lucht \nWetenschappers van KU Leuven ontdekken zandwolken op exoplaneet WASP-107b: “Wetenschappelijke mijlpaal” \nAlien Atmosphere: Webb Detects Water Vapor\, Sulfur Dioxide and Sand Clouds in Nearby Exoplanet
URL:https://www.a3veen.nl/event/wasp-107b-so2-silicate-clouds-but-no-ch4-detected-in-a-warm-neptune-publication/
CATEGORIES:Astronomie,Exoplaneet
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231115
DTEND;VALUE=DATE:20231116
DTSTAMP:20260601T152617
CREATED:20240228T141445Z
LAST-MODIFIED:20240228T141841Z
UID:103424-1700006400-1700092799@www.a3veen.nl
SUMMARY:DoBlackHoleshaveSingularities? - publication
DESCRIPTION:Roy Kerr in a 20 page article published on ResearchGate: there is no proof that black holes contain singularities when they are generated by real physical bodies. \nRoger Penrose claimed sixty years ago that trapped surfaces inevitably lead to light rays of finite affine length (FALL’s). Penrose and Stephen Hawking then asserted that these must end in actual singularities. When they could not prove this they decreed it to be self evident. It is shown that there are counterexamples through every point in the Kerr metric. These are asymptotic to at least one eventhorizon and do not end in singularities. \nLinks:\nWhy does Roy Kerr claim that the Kerr black hole does not contain a singularity? \nKerr disputes singularities in Kerr Black Holes \nRoy Kerr’s recent paper proposes that black holes don’t have singularity. Can someone explain to me his reasoning?
URL:https://www.a3veen.nl/event/doblackholeshavesingularities-publication/
CATEGORIES:Astronomie,Zwart gat
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231116
DTEND;VALUE=DATE:20231117
DTSTAMP:20260601T152617
CREATED:20231116T111229Z
LAST-MODIFIED:20231116T111340Z
UID:98636-1700092800-1700179199@www.a3veen.nl
SUMMARY:Arecibo message (1974) 2023
DESCRIPTION:The Arecibo message is an interstellar radio message carrying basic information about humanity and Earth that was sent to globular star cluster M13 in 1974. \nIt was meant as a demonstration of human technological achievement\, rather than a real attempt to enter into a conversation with extraterrestrials. It has been noted that the low resolution of the image makes it infeasible for any extraterrestrial recipients to attach the intended meaning to most of its elements. The message was broadcast into space a single time via frequency modulated radio waves at a ceremony to mark the remodeling of the Arecibo radio telescope in Puerto Rico on 16 November 1974. The message was aimed at the current location of M13\, about 25\,000 light years from Earth\, because M13 was a large and relatively close collection of stars that was available in the sky at the time and place of the ceremony. \nLinks:\n1st intentional signal to space sent by Arecibo
URL:https://www.a3veen.nl/event/arecibo-message-1974-2023/
CATEGORIES:Astronomie
END:VEVENT
END:VCALENDAR