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:20260601T143539
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:20260601T143539
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:20260601T143539
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:20260601T143539
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:20260601T143539
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:20260601T143539
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:20231001
DTEND;VALUE=DATE:20250101
DTSTAMP:20260601T143539
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:20231128
DTEND;VALUE=DATE:20231129
DTSTAMP:20260601T143539
CREATED:20231128T122207Z
LAST-MODIFIED:20231128T124420Z
UID:99400-1701129600-1701215999@www.a3veen.nl
SUMMARY:#RedPlanetDay 2023
DESCRIPTION:Red Planet Day commemorates the launch of the Mariner 4 spacecraft on November 28\, 1964 which was the first craft to ever reach Mars. \nSince the late 20th century\, Mars has been explored by uncrewed spacecraft and rovers\, with the first flyby by the Mariner 4 probe in 1965\, the first Mars orbiter by the Mars 2 probe in 1971\, and the first landing by Viking 1 in 1976. As of 2023\, there are at least 11 active probes orbiting Mars or at the Martian surface. Mars is an attractive target for human missions. Mars is the fourth planet and the furthest terrestrial planet from the Sun. The reddish color of its surface is due to finely grained iron(III) oxide dust in the soil\, giving it the nickname “the Red Planet”. Mars’s radius is second smallest among the planets in the Solar System at 3\,389.5 km (2\,106 mi). The Martian dichotomy is visible on the surface: on average\, the terrain on Mars’s northern hemisphere is flatter and lower than its southern hemisphere. Mars has a thin atmosphere made primarily of carbon dioxide\, and two irregularly shaped natural satellites\, Phobos and Deimos. Geologically\, Mars is fairly active\, with dust devils sweeping across the landscape and marsquakes (Martian analog to earthquakes) trembling underneath the ground. The surface of Mars hosts a large shield volcano (Olympus Mons) and one of the largest canyons in the Solar System (Valles Marineris). \nMars’s significant orbital eccentricity and axial tilt cause large seasonal changes to the polar ice caps‘ coverage and temperature swings between 163K / −110 °C to 308K / 35 °C on the surface. A Martian solar day (sol) is equal to 24.5 hours and a Martian solar year is equal to 1.88 Earth years. Like the other planets in the Solar System\, Mars was formed approximately 4.5 billion years ago. During the Noachian period from about 4.1 to 3.7 billion years ago\, Mars’s surface was marked by meteor impacts\, valley formation\, erosion\, and the possible presence of water oceans. The Hesperian period from 3.7 to 3.2–2 billion years ago was dominated by widespread volcanic activity and flooding that carved immense outflow channels. The Amazonian period\, which continues to the present\, was marked by the wind’s influence on geological processes. It is unknown whether life has ever existed on Mars. Mars is among the brightest objects in Earth’s sky\, and thus has been known from ancient times. Its high-contrast albedo features make it a common subject for viewing with a telescope. \nLinks:\nRed Planet Day 2023: How Did Mars Get Its Name\, Ways It Is Different From Earth; Things To Know \n(Exo)Planeet : Mars
URL:https://www.a3veen.nl/event/redplanetday-2023/
CATEGORIES:Astronomie,Mars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231128T000000
DTEND;TZID=Europe/Amsterdam:20240101T055900
DTSTAMP:20260601T143539
CREATED:20231128T105553Z
LAST-MODIFIED:20231128T111613Z
UID:99372-1701129600-1704088740@www.a3veen.nl
SUMMARY:Message in a Bottle
DESCRIPTION:Join the mission and have your name engraved on NASA’s Europa Clipper spacecraft as it travels 1.8 billion miles to explore the moon Europa\, an ocean world that may support life. \nLinks:\nMessage in a Bottle \nI’m sending my name to Jupiter’s moon Europa on a NASA spacecraft — and here’s why you should\, too
URL:https://www.a3veen.nl/event/nasa-message-in-a-bottle/
CATEGORIES:Astronomie,Jupiter
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231201
DTEND;VALUE=DATE:20231202
DTSTAMP:20260601T143539
CREATED:20231212T201916Z
LAST-MODIFIED:20231212T210045Z
UID:100269-1701388800-1701475199@www.a3veen.nl
SUMMARY:Chapman-Silverman storm of 1872 / The Extreme Space Weather Event of 1872 February: Sunspots\, Magnetic Disturbance\, and Auroral Displays - publication
DESCRIPTION:Two of the most massive magnetic solar storms known are the Carrington Event of 1859 and the New York Railroad Superstorm of 1921\, the study ‘The Extreme Space Weather Event of 1872 February: Sunspots\, Magnetic Disturbance\, and Auroral Displays‘\, however\, also identified another storm named the Chapman-Silverman storm of 1872. \nLinks:\nHistoric magnetic storms help scientists learn what to expect when one hits \nIn 1872\, a Solar Storm Hit the Earth Generating Auroras from the Tropics to the Poles \nList of solar storms
URL:https://www.a3veen.nl/event/the-extreme-space-weather-event-of-1872-february-sunspots-magnetic-disturbance-and-auroral-displays-publication/
CATEGORIES:Astronomie,Zon
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231208
DTEND;VALUE=DATE:20231209
DTSTAMP:20260601T143539
CREATED:20231212T140541Z
LAST-MODIFIED:20231212T140541Z
UID:100245-1701993600-1702079999@www.a3veen.nl
SUMMARY:The case for a Lunar Anthropocene - publication
DESCRIPTION:Human exploration of the Solar System began on the Moon during the space race of the mid-twentieth century\, to facilitate documentation and study of the human influence on the Moon\, the authors of the  argue it is time to designate a ‘Lunar Anthropocene’. \nLinks:\nThe moon has been altered by human activity. Are we in a ‘Lunar Anthropocene?’
URL:https://www.a3veen.nl/event/the-case-for-a-lunar-anthropocene-publication/
CATEGORIES:Astronomie,Maan
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231212T020800
DTEND;TZID=Europe/Amsterdam:20231212T022600
DTSTAMP:20260601T143539
CREATED:20231208T160221Z
LAST-MODIFIED:20231211T212435Z
UID:100081-1702346880-1702347960@www.a3veen.nl
SUMMARY:(319) Leona asteroid occults HIP 27989 (Betelgeuse)
DESCRIPTION:For years\, astronomers have worried that Betelgeuse might explode. Instead\, it’s about to disappear. On Dec. 12th (Universal Time)\, main belt asteroid Leona will pass directly in front of Betelgeuse\, a first-magnitude star in the shoulder of Orion. Millions of people in a narrow path stretching from South Florida to Europe can look up and see the red giant dim or even vanish. \nBetelgeuse is not a typical star. Its diameter is 760 times the sun’s\, so it appears as a disk 40 milliarcseconds across\, much larger than most other stars. High resolution images of Betelgeuse seem to reveal a star in turmoil with giant convection cells bubbling up to the surface. The passage of the asteroid across Betelgeuse may allow astronomers to map these cells and evaluate their role in a possible future supernova explosion. Much is unknown about this occultation. The shape of the asteroid itself is an X-factor. In Sept. 2023\, Ortiz and colleagues watched the asteroid occult another star from 17 different locations on Earth. They found that Leona has an oblong shape with dimensions 80 x 55 km\, whereas most predictions of the occultation assume the asteroid to be spherical. Leona’s odd shape\, plus the fact that it is rotating\, could produce some surprises. The occultation path may be wider than expected\, and there could be interesting “partial eclipse” effects visible even near the center of the path. \nLinks:\n(319) Leona occults HIP 27989 on 12 Dec 2023 \nExtremely rare occultation of Betelgeuse
URL:https://www.a3veen.nl/event/319-leona-occults-hip-27989/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231214T173000
DTEND;TZID=Europe/Amsterdam:20231214T183000
DTSTAMP:20260601T143539
CREATED:20231211T101250Z
LAST-MODIFIED:20231211T102241Z
UID:100182-1702575000-1702578600@www.a3veen.nl
SUMMARY:Meteorenzwerm Geminiden in december 2023
DESCRIPTION:De meteorenzwerm Geminiden bereikt op donderdag 14 december 2023\, rond 17:30\, zijn maximum\, de meteoren van de Geminiden zijn gemiddeld snel\, gelig van kleur\, vaak helder en hebben korte sporen. \nWanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 120 meteoren per uur vallen. Rond 02:30 staat de radiant van de zwerm in het hoogste punt (op 70°) aan de hemel. Het beste moment om Geminiden waar te nemen is op 15 december rond 00:45. Dat is circa 7 uur na het moment van het maximum\, wat ongunstig is voor een meteorenzwerm met een dermate korte piek. Daardoor zijn ten minste 30% minder meteoren te zien dan in het ideale geval. De radiant staat op dat moment zo’n 62° boven de oostzuidoostelijke horizon. In onze streken zijn dan vermoedelijk altijd nog circa 50–65 meteoren per uur van deze zwerm te zien. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 55–75 “vallende sterren” per uur te zien. Op een goed donkere plek zijn bijna drie keer zoveel meteoren te zien als in dichtbevolkt gebied. De Maan stoort niet. Rond 08:00 gaat het schemeren en om 08:41 komt de Zon op. De meteoren van de meeste zwermen verschijnen niet allemaal op de dag van het maximum\, maar de Geminiden zijn bijzonder scherp gepiekt\, en de zwerm duurt niet veel langer dan 21 uur. Een dag voor of na het maximum is nog slechts 21% van het piekaantal meteoren per uur te zien. De typische snelheden van de meteoren in deze zwerm zijn met circa 35 km/s (ongeveer 124.560 km/uur) vrij gemiddeld. Er is geen speciale apparatuur nodig om meteoren waar te kunnen nemen. \nLinks:\nDe meteorenzwerm Geminiden in december 2023 \nThe Geminids meteor shower
URL:https://www.a3veen.nl/event/meteorenzwerm-geminiden-in-december-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231223T114500
DTEND;TZID=Europe/Amsterdam:20231223T170000
DTSTAMP:20260601T143539
CREATED:20231222T162236Z
LAST-MODIFIED:20231222T162506Z
UID:100701-1703331900-1703350800@www.a3veen.nl
SUMMARY:Meteorenzwerm Ursiden in december 2023
DESCRIPTION:De meteorenzwerm Ursiden bereikt op zaterdag 23 december 2023\, rond 11:45\, zijn maximum\, de meteoren van de Ursiden zijn niet erg opvallend. \nWanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 12 meteoren per uur vallen. Rond 09:00 staat de radiant van de zwerm in het hoogste punt (op 67°) aan de hemel. Het beste moment om Ursiden waar te nemen is op 23 december rond 06:45. Dat is circa 5 uur voor het maximum van deze meteoren\, wat niet ideaal is voor een zwerm met een korte piek als deze. Hierdoor zijn zeker 25% minder meteoren te zien dan in het meest gunstige geval. De radiant staat op dat moment zo’n 63° boven de noordnoordoostelijke horizon. Door de matige omstandigheden zijn er in onze streken dan vermoedelijk maar circa 3–7 meteoren per uur van deze zwerm te zien. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 13–21 “vallende sterren” per uur te zien. Op een donkere locatie zijn circa vijf keer zoveel meteoren te zien als in dichtbevolkt gebied. De Maan is voor ongeveer 85% verlicht en kan flink storen dit jaar; de zwakkere meteoren zullen hierdoor niet zichtbaar zijn. De Maan gaat om 04:55 onder\, waarna deze minder zal storen. Rond 08:00 gaat het schemeren en om 08:47 komt de Zon op. De meteoren van de meeste zwermen verschijnen niet allemaal op de dag van het maximum\, maar de Ursiden zijn bijzonder scherp gepiekt\, en de zwerm duurt niet veel langer dan 16 uur. Een dag voor of na het maximum is nog slechts 14% van het piekaantal meteoren per uur te zien. De snelheden van de meteoren van de Ursiden zijn gemiddeld: zo’n 35 km/s\, dat is circa 126.000 km/uur! Er is geen speciale apparatuur nodig om meteoren waar te kunnen nemen. \nLinks:\nMeteorenzwerm Ursiden in december 2023
URL:https://www.a3veen.nl/event/meteorenzwerm-ursiden-in-december-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231224
DTEND;VALUE=DATE:20231225
DTSTAMP:20260601T143539
CREATED:20231116T195845Z
LAST-MODIFIED:20231116T201204Z
UID:98692-1703376000-1703462399@www.a3veen.nl
SUMMARY:Deep Space Network - start (1963) 2023
DESCRIPTION:The NASA Deep Space Network (DSN) formally announced its intention to send missions into deep space on 24 December 1963; it has remained in continuous operation in one capacity or another ever since. \nThe Deep Space Network is a worldwide network of American spacecraft communication ground segment facilities\, located in the United States (California)\, Spain (Madrid)\, and Australia (Canberra)\, that supports NASA’s interplanetary spacecraft missions. It also performs radio and radar astronomy observations for the exploration of the Solar System and the universe\, and supports selected Earth-orbiting missions. DSN is part of the NASA Jet Propulsion Laboratory (JPL). \nLinks:\nDeep Space Network \nThe Deep Space Network: How NASA spacecraft make long-distance calls
URL:https://www.a3veen.nl/event/deep-space-network-start-1963-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231226T203000
DTEND;TZID=Europe/Amsterdam:20231226T213000
DTSTAMP:20260601T143539
CREATED:20231222T120112Z
LAST-MODIFIED:20231222T120343Z
UID:100653-1703622600-1703626200@www.a3veen.nl
SUMMARY:Vroege Vogels : Ode aan de Maan | 26 december 2023 (Radio 1 NPO)
DESCRIPTION:Soms rond en geel iets boven de horizon\, dan weer een heldere sikkel hoog aan de hemel of een plotselinge verschijning vanachter de wolken: iedereen is bekend met de maan. \nMaar hoe goed kennen we ons dichtstbijzijnde hemellichaam nou echt? In dit uur duikt Vroege Vogels in de ontstaansgeschiedenis en rijke mythologie van de maan en ontdekken we hoe ze het leven op aarde beïnvloedt. “Een natuurlijke maan of natuurlijke satelliet is een hemellichaam dat rond een (exo)planeet\, dwergplaneet of planetoïde\, of eventueel een andere maan draait.”\, zo luidt de definitie van Wikipedia. De meeste planeten in ons zonnestelsel hebben manen: Mars heeft er twee\, Uranus vijf en bij Jupiter staat de teller op 95. Onze aarde heeft er slechts één; de maan. Onze maan is in verhouding tot andere manen in ons zonnestelsel ontzettend groot. Daarmee is haar invloed op de aarde ook relatief groot. De maan zorgt ten eerste voor het getij. Zonder de maan zou de Waddenzee -waarschijnlijk ons belangrijkste natuurgebied- niet bestaan. Ten tweede reflecteert de maan zonlicht\, maar telkens in verschillende mate: amper tijdens nieuwe maan tot vrij veel tijdens volle maan. Veel dieren houden daar rekening mee. Zo zingen oehoes veel meer tijdens volle dan tijdens nieuwe maan. Waarschijnlijk omdat bij verlichte nachten hun witte keelvlek -een belangrijk communicatiemiddel voor oehoes- tijdens het zingen beter zichtbaar is. In Oeganda blijken leeuwen minder succesvol te zijn tijdens nachtelijke strooptochten onder een volle maan\, omdat hun prooien hen waarschijnlijk makkelijker opmerken. \nVroege Vogels is een live-radioprogramma\, tv-programma en online community van BNNVARA over natuur en milieu. In het radioprogramma wordt het gesproken woord omlijst door licht klassieke muziek en salonmuziek. Het radioprogramma werd in 1978 voor het eerst uitgezonden door de VARA en is een van de langst lopende en best beluisterde radioprogramma’s van de publieke omroep. Het wordt elke zondagmorgen uitgezonden tussen 07:00 en 10:00 op NPO Radio 1. De beginmuziek is een bewerking van Vivaldi’s “Piccolo Concerto in C major” (RV 443). \nLinks:\nVroege Vogels (na afloop terugluisteren) \nOde aan de Maan | Radiospecial van Vroege Vogels \nNPO Radio 1 live stream
URL:https://www.a3veen.nl/event/vroege-vogels-ode-aan-de-maan-26-december-2023-radio-1-npo/
CATEGORIES:Astronomie,Maan
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231231
DTEND;VALUE=DATE:20240224
DTSTAMP:20260601T143539
CREATED:20231231T215943Z
LAST-MODIFIED:20231231T220049Z
UID:100930-1703980800-1708732799@www.a3veen.nl
SUMMARY:Galactic/Extragalactic ULDB Spectroscopic Terahertz Observatory GUSTO
DESCRIPTION:The GUSTO (Galactic / Extragalactic ULDB Spectroscopic Terahertz Observatory) mission is a planned high-altitude balloon mission that will carry an infrared telescope to measure fine-structure line emission from the interstellar medium. The mission was developed by NASA’s Explorers Program\, and was launched on December 31\, 2023 from Antarctica. \nGUSTO is a NASA mission that will launch a high-altitude balloon including a one-meter telescope. GUSTO has been launched December 31st 2023 and its aim is to provide a comprehensive understanding of the inner workings of our galaxy and one of our companion galaxies\, the Large Magellanic Cloud (LMC)\, by tracing all phases of the interstellar medium. GUSTO will be launched from Antarctica to a high altidude and from there it will get a 55 day long clear view of our galaxy and one of our companion galaxies\, the Large Magellanic Cloud. \nLinks:\nGUSTO – SRON \nGUSTO – NASA
URL:https://www.a3veen.nl/event/galactic-extragalactic-uldb-spectroscopic-terahertz-observatory-gusto/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240101
DTEND;VALUE=DATE:20250101
DTSTAMP:20260601T143539
CREATED:20240101T192244Z
LAST-MODIFIED:20240920T182639Z
UID:113551-1704067200-1735689599@www.a3veen.nl
SUMMARY:Jaar van het Planetarium
DESCRIPTION:By Bundesarchiv\, Bild 183-1987-1008-020 / CC-BY-SA 3.0\, CC BY-SA 3.0 de\nIn 1923\, ZEISS presented the world’s first projection planetarium developed for the Deutsches Museum in Munich\, the first public demonstration and hence the birth of the modern planetarium took place on this occasion. \nOn 7 May 1925\, the ZEISS Planetarium in the Deutsches Museum began regular operation. Today\, as modern high-tech domes\, star theaters offer fascinating fulldome shows and are still a crowd puller after 100 years. \nLinks:\n100 years of ZEISS planetariums
URL:https://www.a3veen.nl/event/jaar-van-het-planetarium/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240103
DTEND;VALUE=DATE:20240104
DTSTAMP:20260601T143539
CREATED:20240101T232114Z
LAST-MODIFIED:20240103T193106Z
UID:100943-1704240000-1704326399@www.a3veen.nl
SUMMARY:Quadrantiden Meteorenzwerm 2024
DESCRIPTION:De Quadrantiden behoren tot de sterkste meteorenzwermen van het jaar\, de activiteit van de meteorenzwerm duurt jaarlijks van 28 december tot 12 januari\, op hun piek in 2024 op 3 januari produceren de Quadrantiden ongeveer 80 meteoren per uur (volgens de Internationale Meteorologische Organisatie kan het aantal meteoren zelfs kortstondig 200 per uur bereiken). \nIn 2024 zijn de observatieomstandigheden voor de Quadrantiden gunstig. Het hoogtepunt van de meteorenzwerm valt samen met de Laatste Kwartier Maan\, die rond middernacht opkomt\, waardoor er meerdere uren van donkere lucht beschikbaar zijn voor waarneming. In tegenstelling tot andere meteorenregens moet je bij de Quadrantiden precies op tijd zijn. Alle meteorenregens kennen een piek. Het zijn zwermen stof en puin in de ruimte waar de baan van de aarde doorheen gaat. De piek van het aantal vallende sterren is als deze baan door het ‘dikste’ deel van de zwerm gaat. De zwerm van de Quadrantiden is dik\, maar smal en dus duurt de piek maar kort\, slechts zes uur. In 2024 wordt de piek verwacht op 4 januari\, rond 14:00 GMT\, hoewel de exacte tijd kan variëren. Zoek naar de meteoren minstens drie uur voor en na dit tijdstip om de volledige piek te ervaren. Als je de piek mist\, maak je geen zorgen. Je kunt nog steeds tot 25 meteoren per uur zien in de dagen rond 4 januari. En je kunt zelfs enkele van de heldere vuurballen zien waar de Quadrantiden bekend om staan. \nLinks:\nQuadrantiden Meteorenzwerm 2024 \nThe Quadrantid meteor shower 2024 peaks tonight alongside a bright moon
URL:https://www.a3veen.nl/event/quadrantiden-meteorenzwerm-2024/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240104
DTEND;VALUE=DATE:20240913
DTSTAMP:20260601T143539
CREATED:20240915T123934Z
LAST-MODIFIED:20240915T124451Z
UID:113213-1704326400-1726185599@www.a3veen.nl
SUMMARY:Astronomy Photographer of the Year competition 2024
DESCRIPTION:The 2024 Overall Winner of the Astronomy Photographer of the Year competition is “Distorted Shadows of the Moon’s Surface Created by an Annular Eclipse” © Ryan Imperio (USA)\, click on picture to see original photo\nAstronomy Photographer of the Year is an annual astronomy photography competition and exhibition that is organised by the Royal Observatory\, Greenwich (part of Royal Museums Greenwich). \nThe competition was launched in 2009 during the International Year of Astronomy. It has expanded significantly since this time and since 2016 the overall winner receives a prize of £10\,000. In 2018 the exhibition moved to the Photography Gallery at the National Maritime Museum\, where the exhibition showed a 10-year retrospective of the competition’s 31 winning images alongside 69 of the best winning images from the past nine years. Since then\, each year’s winning images have been showcased alongside the shortlisted images in the annual exhibition. \nLinks:\nAstronomy Photographer of the Year \nAnd the Winner is…. Astronomy Photographers of the Year 2024 Announced
URL:https://www.a3veen.nl/event/astronomy-photographer-of-the-year-competition-2024/
CATEGORIES:Astronomie,Foto
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240104T113000
DTEND;TZID=Europe/Amsterdam:20240104T170000
DTSTAMP:20260601T143539
CREATED:20240104T183101Z
LAST-MODIFIED:20240104T185804Z
UID:101020-1704367800-1704387600@www.a3veen.nl
SUMMARY:Meteorenzwerm Boötiden in januari 2024
DESCRIPTION:De meteorenzwerm Boötiden bereikt op donderdag 4 januari 2024\, rond 11:30 uur\, zijn maximum. \nDe meteoren van de Boötiden hebben lange sporen en zijn zwak en blauwachtig. Wanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 130 meteoren per uur vallen. Rond 9:00 uur staat de radiant van de zwerm in het hoogste punt (op 86°) aan de hemel. Het beste moment om Boötiden waar te nemen is op 4 januari rond 7:00 uur (zie het kaartje). Dat is ongveer 4.5 uur voor het maximum van deze meteoren\, wat ongunstig is voor een meteorenzwerm met een dermate korte piek. Daardoor zijn ten minste 55% minder meteoren te zien dan in het ideale geval. De radiant staat op dat moment zo’n 69° boven de oostelijke horizon. Door de matige omstandigheden zijn er in onze streken dan vermoedelijk “maar” circa 23–34 meteoren per uur van deze zwerm te zien\, altijd nog de moeite waard om te gaan waarnemen. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 27–39 “vallende sterren” per uur te zien. Op een donkere plek zijn circa 80% meer meteoren te zien dan in een grote stad. De Maan komt om 0:50 uur op\, is voor ongeveer 50% verlicht en kan eventueel storen. Rond 8:00 uur gaat het schemeren en om 8:48 uur komt de Zon op. De Boötidenzwerm is dermate scherp gepiekt dat het zaak is zo dicht mogelijk bij het maximum waar te nemen. \nLinks:\nMeteorenzwerm Boötiden in januari 2024
URL:https://www.a3veen.nl/event/meteorenzwerm-bootiden-in-januari-2024/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240107
DTEND;VALUE=DATE:20240112
DTSTAMP:20260601T143539
CREATED:20240112T210258Z
LAST-MODIFIED:20240126T162330Z
UID:101291-1704585600-1705017599@www.a3veen.nl
SUMMARY:#AAS243 meeting
DESCRIPTION:The American Astronomical Society (AAS) is an American society of professional astronomers and other interested individuals\, headquartered in Washington\, DC. \nThe primary objective of the AAS is to promote the advancement of astronomy and closely related branches of science\, while the secondary purpose includes enhancing astronomy education and providing a political voice for its members through lobbying and grassroots activities. Its current mission is to enhance and share humanity’s scientific understanding of the universe as a diverse and inclusive astronomical community. One goal of the Society to help achieve its mission is to facilitate and strengthen the interactions among members through professional meetings and other means\, including supporting AAS Divisions and others in the field. AAS Meeting Services provides comprehensive meeting planning and support to our Divisions\, ourselves\, and others in the astronomical sciences. \n\nLinks:\n243rd AAS meeting \nNewly discovered cosmic megastructure challenges theories of the universe \nA Big Cosmological Mystery \nAstrobites at AAS 243 \nAAS abstracts on ADS
URL:https://www.a3veen.nl/event/aas243-meeting/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240118T080000
DTEND;TZID=Europe/Amsterdam:20240118T170000
DTSTAMP:20260601T143539
CREATED:20240118T193615Z
LAST-MODIFIED:20240118T194935Z
UID:101594-1705564800-1705597200@www.a3veen.nl
SUMMARY:Babelsberger Sternennächte : Universum mit Tausenden Galaxien • Neue Deep Fields | Dr. Tanya Urrutia (TV YouTube webcast)
DESCRIPTION:Die Babelsberger Sternennächte finden online statt\, in der Regel gibt es immer am 3. Donnerstag im Monat einen neuen Vortrag einer Wissenschaftlerin oder eines Wissenschaftlers des AIP\, der ab 20 Uhr auf dem YouTube-Kanal von Urknall\, Weltall und das Leben ausgestrahlt wird (Playlist). \nDie tiefen Hubble-Beobachtungen in scheinbar leeren Regionen am Himmel haben unser Wissen in der Galaxienentwicklung\, insbesondere im frühen Universum\, revolutioniert. Dr. Tanya Urrutia erklärt in ihrem Vortrag\, warum diese „Deep Fields“ so wichtig sind und wie sie unser Wissen voranbringen\, ausgehend von der Geschichte des Forschungsfeldes „Extragalaktik“ bis zu ihrer eigenen Arbeit mit dem MUSE-Instrument am Very Large Telescope in Chile. Sobald der neue Vortrag verfügbar ist\, ist der Link direkt auf dieser Seite zu finden. Bitte beachten Sie\, dass fast alle Vorträge auf Deutsch gehalten werden. \nLink:\nBabelsberger Sternennächte
URL:https://www.a3veen.nl/event/babelsberger-sternennachte-universum-mit-tausenden-galaxien-neue-deep-fields-dr-tanya-urrutia-tv-youtube-webcast/
CATEGORIES:Astronomie,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240122
DTEND;VALUE=DATE:20240123
DTSTAMP:20260601T143539
CREATED:20240202T161214Z
LAST-MODIFIED:20240202T161214Z
UID:102349-1705881600-1705967999@www.a3veen.nl
SUMMARY:False vacuum decay via bubble formation in ferromagnetic superfluids - publication
DESCRIPTION:Article about an intriguing idea behind what’s known as False Vacuum Decay – something that may have created our universe but also something that can one day destroy it as well. \nLinks:
URL:https://www.a3veen.nl/event/false-vacuum-decay-via-bubble-formation-in-ferromagnetic-superfluids-publication/
CATEGORIES:Astronomie,Kwantummechanica
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240125
DTEND;VALUE=DATE:20240126
DTSTAMP:20260601T143539
CREATED:20240128T144729Z
LAST-MODIFIED:20240128T151617Z
UID:102062-1706140800-1706227199@www.a3veen.nl
SUMMARY:GJ 9827d / NASA’s Hubble Finds Water Vapor in Small Exoplanet’s Atmosphere - publication
DESCRIPTION:Astronomers using NASA’s Hubble Space Telescope observed the smallest exoplanet where water vapor has been detected in the atmosphere. \nAt only approximately twice Earth’s diameter\, the planet GJ 9827d could be an example of potential planets with water-rich atmospheres elsewhere in our galaxy. However\, it remains too early to tell whether Hubble spectroscopically measured a small amount of water vapor in a puffy hydrogen-rich atmosphere\, or if the planet’s atmosphere is mostly made of water\, left behind after a primeval hydrogen/helium atmosphere evaporated under stellar radiation. If the planet has a residual water-rich atmosphere\, then it must have formed farther away from its host star\, where the temperature is cold and water is available in the form of ice\, than its present location. In this scenario\, the planet would have then migrated closer to the star and received more radiation. The hydrogen was heated and escaped\, or is still in the process of escaping the planet’s weak gravity. The alternative theory is that the planet formed close to the hot star\, with a trace of water in its atmosphere. The Hubble program observed the planet during 11 transits – events in which the planet crossed in front of its star – that were spaced out over three years. During transits\, starlight is filtered through the planet’s atmosphere and has the spectral fingerprint of water molecules. If there are clouds on the planet\, they are low enough in the atmosphere so that they don’t completely hide Hubble’s view of the atmosphere\, and Hubble is able to probe water vapor above the clouds. GJ 9827d was discovered by NASA’s Kepler Space Telescope in 2017. It completes an orbit around a red dwarf star every 6.2 days. The star\, GJ 9827\, lies 97 light-years from Earth in the constellation Pisces. \nLinks:\nNASA’s Hubble Finds Water Vapor in Small Exoplanet’s Atmosphere \nHubble has found water on a small rocky planet beyond our Solar System \nNu voor het eerst ook waterdamp gevonden in de atmosfeer van een kleine planeet
URL:https://www.a3veen.nl/event/gj-9827d-nasas-hubble-finds-water-vapor-in-small-exoplanets-atmosphere-publication/
CATEGORIES:Astronomie,Exoplaneet
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240126
DTEND;VALUE=DATE:20240127
DTSTAMP:20260601T143539
CREATED:20240127T185858Z
LAST-MODIFIED:20240127T191839Z
UID:102017-1706227200-1706313599@www.a3veen.nl
SUMMARY:Ground penetrating radar observations of the contact between the western delta and the crater floor of Jezero crater\, Mars - publication
DESCRIPTION:The delta deposits in Jezero crater contain sedimentary records of potentially habitable conditions on Mars\, NASA’s Perseverance rover is exploring the Jezero western delta with a suite of instruments that include the RIMFAX ground penetrating radar\, which provides continuous subsurface images that probe up to 20 meters below the rover. \nAs Perseverance traversed across the contact between the Jezero crater floor and the delta\, RIMFAX detected a distinct discontinuity in the subsurface layer structure. Below the contact boundary are older crater floor units exhibiting discontinuous inclined layering. Above the contact boundary are younger basal delta units exhibiting regular horizontal layering. At one location\, there is a clear unconformity between the crater floor and delta layers\, which implies that the crater floor experienced a period of erosion before the deposition of the overlying delta strata. The regularity and horizontality of the basal delta sediments observed in the radar cross sections indicate that they were deposited in a low-energy lake environment. \nLinks:\nGround penetrating radar observations of the contact between the western delta and the crater floor of Jezero crater\, Mars\n \nKrater op rode planeet was ooit een meer\, bevestigt Marsrover
URL:https://www.a3veen.nl/event/ground-penetrating-radar-observations-of-the-contact-between-the-western-delta-and-the-crater-floor-of-jezero-crater-mars-publication/
CATEGORIES:Astronomie,Mars
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240201
DTEND;VALUE=DATE:20241001
DTSTAMP:20260601T143539
CREATED:20240322T020037Z
LAST-MODIFIED:20240322T120549Z
UID:104633-1706745600-1727740799@www.a3veen.nl
SUMMARY:T Coronae Borealis : Nova Explosion 2024
DESCRIPTION:Star system T Coronae Borealis (T CrB) located 3\,000 light-years away from Earth\, is predicted to\nbecome visible to the unaided eye soon. \nThis could be a once-in-a-lifetime viewing opportunity as the nova ouburst only occurs about every 80 years. T CrB\, last exploded in 1946 and astronomers believe it will do so again between February and September 2024. The star system\, normally magnitude +10\, which is far too dim to see with the unaided eye\, will jump to magnitude +2 during the event. This will be of similar brightness to the North Star\, Polaris. Once its brightness peaks\, it should be visible to the unaided eye for several days and just over a week with binoculars before it dims again\, possibly for another 80 years. As we wait for the nova\, become familiar with the constellation Corona Borealis\, or the Northern Crown — a small\, semicircular arc near Bootes and Hercules. This is where the outburst will appear as a “new” bright star. This recurring nova is only one of five in our galaxy. This happens because T CrB is a binary system with a white dwarf and red giant. The stars are close enough that as the red giant becomes unstable from its increasing temperature and pressure and begins ejecting its outer layers\, the white dwarf collects that matter onto its surface. The shallow dense atmosphere of the white dwarf eventually heats enough to cause a runaway thermonuclear reaction – which produces the nova we see from Earth. \nLinks:\nView Nova Explosion\, ‘New’ Star in Northern Crown
URL:https://www.a3veen.nl/event/t-coronae-borealis-nova-explosion-2024/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240208T073300
DTEND;TZID=Europe/Amsterdam:20270208T170000
DTSTAMP:20260601T143539
CREATED:20240209T204257Z
LAST-MODIFIED:20240209T204747Z
UID:102637-1707377580-1802106000@www.a3veen.nl
SUMMARY:Plankton\, Aerosol\, Cloud\, ocean Ecosystem
DESCRIPTION:Plankton\, Aerosol\, Cloud\, ocean Ecosystem (PACE) is a NASA Earth-observing satellite mission that will continue and advance observations of global ocean color\, biogeochemistry\, and ecology\, as well as the carbon cycle\, aerosols and clouds. \nPACE will be used to identify the extent and duration of phytoplankton blooms and improve understanding of air quality. These and other uses of PACE data will benefit the economy and society\, especially sectors that rely on water quality\, fisheries and food security. After being proposed for cancellation under President Trump’s FY 2018 budget\, it was restored by Congress. The PACE project is managed by NASA Goddard Space Flight Center. The main instrument and bus were designed and built at Goddard Space Flight Center. On 4 February 2020\, NASA announced the selection of SpaceX to launch PACE on a Falcon 9\, at a total cost to NASA of US$80.4 million\, including the launch service and other mission-related costs. The total cost of the mission is $964 million\, which includes spacecraft construction\, launch\, and operations. PACE successfully launched on 8 February 2024 at 07:33. \nLinks:\nPACE
URL:https://www.a3veen.nl/event/plankton-aerosol-cloud-ocean-ecosystem/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240215T200000
DTEND;TZID=Europe/Amsterdam:20240215T210000
DTSTAMP:20260601T143539
CREATED:20240215T092829Z
LAST-MODIFIED:20240216T092429Z
UID:102840-1708027200-1708030800@www.a3veen.nl
SUMMARY:Babelsberger Sternennächte : Die Sonne als Chronometer physikalischer Prozesse (TV webcast)
DESCRIPTION:Die Babelsberger Sternennächte finden online statt\, in der Regel gibt es immer am 3. Donnerstag im Monat einen neuen Vortrag einer Wissenschaftlerin oder eines Wissenschaftlers des AIP\, der ab 20 Uhr auf dem YouTube-Kanal von Urknall\, Weltall und das Leben ausgestrahlt wird (Playlist). \nAm Donnerstag 15-02-2024 ab 20 Uhr ist der Vortrag von apl Prof. Dr. Carsten Denker zum Thema „Die Sonne als Chronometer physikalischer Prozesse“ aus der Reihe der Babelsberger Sternennächte online. Die Prozesse der Sonne unterliegen verschiedenen Zeitskalen: Während sich die Entwicklung der Sonne über Milliarden von Jahren erstreckt\, dauert der Sonnenfleckenzyklus nur 11 Jahre und Strahlungsausbrüche an der Oberfläche der Sonne treten innerhalb weniger Stunden oder gar nur Sekunden auf. In seinem Vortrag stellt Carsten Denker diese und weitere Sonnenphänomene vor und erläutert moderne Beobachtungsinstrumente\, die dazu dienen\, die Sonne zu erforschen und unser physikalisches Verständnis unseres Heimatsterns zu vertiefen. \nBitte beachten Sie\, dass fast alle Vorträge auf Deutsch gehalten werden. \nLink:\nBabelsberger Sternennächte \nVirtueller Vortrag: Babelsberger Sternennacht am 15. Februar 2024
URL:https://www.a3veen.nl/event/babelsberger-sternennachte-die-sonne-als-chronometer-physikalischer-prozesse-tv-webcast/
CATEGORIES:Astronomie,Zon
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240219
DTEND;VALUE=DATE:20240220
DTSTAMP:20260601T143539
CREATED:20240220T212724Z
LAST-MODIFIED:20240220T213434Z
UID:103126-1708300800-1708387199@www.a3veen.nl
SUMMARY:J0529-4351 : Brightest and fastest-growing: astronomers identify record-breaking quasar / The accretion of a solar mass per day by a 17-billion solar mass black hole - publication
DESCRIPTION:Using the European Southern Observatory’s (ESO) Very Large Telescope (VLT)\, astronomers have characterised a bright quasar\, finding it to be not only the brightest of its kind\, but also the most luminous object ever observed. \nQuasars are the bright cores of distant galaxies and they are powered by supermassive black holes. The black hole in this record-breaking quasar is growing in mass by the equivalent of one Sun per day\, making it the fastest-growing black hole to date. The black holes powering quasars collect matter from their surroundings in a process so energetic that it emits vast amounts of light. So much so that quasars are some of the brightest objects in our sky\, meaning even distant ones are visible from Earth. As a general rule\, the most luminous quasars indicate the fastest-growing supermassive black holes. Finding quasars requires precise observational data from large areas of the sky. The resulting datasets are so large\, researchers often use machine-learning models to analyse them and tell quasars apart from other celestial objects. However\, these models are trained on existing data\, which limits the potential candidates to objects similar to those already known. If a new quasar is more luminous than any other previously observed\, the programme might reject it and classify it instead as a star not too distant from Earth. \nAn automated analysis of data from the European Space Agency’s Gaia satellite passed over J0529-4351 for being too bright to be a quasar\, suggesting it to be a star instead. The researchers identified it as a distant quasar last year using observations from the ANU 2.3-metre telescope at the Siding Spring Observatory in Australia. Discovering that it was the most luminous quasar ever observed\, however\, required a larger telescope and measurements from a more precise instrument. The X-shooter spectrograph on ESO’s VLT in the Chilean Atacama Desert provided the crucial data. The fastest-growing black hole ever observed will also be a perfect target for the GRAVITY+ upgrade on ESO’s VLT Interferometer (VLTI)\, which is designed to accurately measure the mass of black holes\, including those far away from Earth. Additionally\, ESO’s Extremely Large Telescope (ELT)\, a 39-metre telescope under construction in the Chilean Atacama Desert\, will make identifying and characterising such elusive objects even more feasible. \nLinks:\nBrightest and fastest-growing: astronomers identify record-breaking quasar
URL:https://www.a3veen.nl/event/j0529-4351-brightest-and-fastest-growing-astronomers-identify-record-breaking-quasar-the-accretion-of-a-solar-mass-per-day-by-a-17-billion-solar-mass-black-hole-publication/
CATEGORIES:Astronomie
END:VEVENT
END:VCALENDAR