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BEGIN:VEVENT
DTSTART;VALUE=DATE:20200210
DTEND;VALUE=DATE:20270211
DTSTAMP:20260601T060449
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:20260601T060449
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:20260601T060449
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;TZID=Europe/Amsterdam:20230413T141500
DTEND;TZID=Europe/Amsterdam:20351213T170000
DTSTAMP:20260601T060449
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:20260601T060449
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:20260601T060449
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:20240101
DTEND;VALUE=DATE:20250101
DTSTAMP:20260601T060449
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:20240104
DTEND;VALUE=DATE:20240913
DTSTAMP:20260601T060449
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;VALUE=DATE:20240201
DTEND;VALUE=DATE:20241001
DTSTAMP:20260601T060449
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:20260601T060449
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;VALUE=DATE:20240321
DTEND;VALUE=DATE:20250106
DTSTAMP:20260601T060449
CREATED:20240321T190242Z
LAST-MODIFIED:20240912T180855Z
UID:113068-1710979200-1736121599@www.a3veen.nl
SUMMARY:Dichter bij het Zwarte Gat - tentoonstelling
DESCRIPTION:Zwarte Gaten: Mysterieuze plekken in de kosmos\, die alles opslokken en waar niets\, zelfs licht niet\, uit ontsnappen kan. \nHet zijn misschien wel de spannendste fenomenen van het heelal\, waar ook de wetenschappers nog lang niet alles van begrijpen. Iedereen heeft van zwarte gaten gehoord en heeft er wel een beeld bij. De spannende\, extreme eigenschappen van deze plekken zijn inspiratie geweest voor tal van verhalen\, films en games. Er wordt al decennialang onderzoek naar gedaan en de eerste afbeelding van een zwart gat staat nog vers in het geheugen gegrift. Maar wat zijn zwarte gaten dan eigenlijk?  Zijn ze echt gevaarlijk? Moeten we zwarte gaten vrezen? Is een zwart gat wel een gat? In de nieuwe tentoonstelling van Rijksmuseum Boerhaave word je stapsgewijs door deze boeiende materie geloodst\, zodat je aan het einde van je bezoek iets dichter bij het zwarte gat bent gekomen. In de tentoonstelling zijn bijzondere objecten en topstukken te zien\, zowel uit de eigen collectie van het museum als bruiklenen van onder meer Roger Penrose persoonlijk\, het Rijksmuseum\, Kunstmuseum Den Haag en het Science Museum in Londen. Zo zijn er prenten van Escher\, de eerste brief van Escher aan Penrose\, persoonlijke objecten van zwartegatenpionier Stephen Hawking\, de pen van Einstein\, een litho van Jean Pierre Luminet\, tekeningen\, brieven en een puzzel van Roger Penrose en couture uit de Black Hole collectie van niemand minder dan Viktor & Rolf. Nieuwsgierig geworden? Na een bezoek aan de tentoonstelling over Zwarte Gaten hoef je niet meer bang te zijn voor het ogenschijnlijk enge ‘monster’. Ontdek waarom ook wetenschappers eindeloos gefascineerd zijn door zwarte gaten en kom meer te weten over de ongrijpbaarheid van ons heelal. \nLinks:\nDichter bij het Zwarte Gat \nDichter bij het Zwarte Gat – Museumtijdschrift
URL:https://www.a3veen.nl/event/dichter-bij-het-zwarte-gat-tentoonstelling/
LOCATION:Rijksmuseum Boerhaave\, Lange Sint Agnietenstraat 10\, Leiden\, Netherlands
CATEGORIES:Astronomie,Zwart gat
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240416
DTEND;VALUE=DATE:20240417
DTSTAMP:20260601T060449
CREATED:20240416T070217Z
LAST-MODIFIED:20240416T182207Z
UID:106251-1713225600-1713311999@www.a3veen.nl
SUMMARY:Zwaarste stellaire zwarte gat in ons Melkwegstelsel ontdekt / Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry - publication
DESCRIPTION:Astronomen hebben het zwaarste stellaire zwarte gat ontdekt dat tot nu toe in het Melkwegstelsel is aangetroffen\, het zwarte gat werd opgemerkt in gegevens van de Gaia-ruimtetelescoop van het Europese ruimteagentschap ESA\, omdat het een vreemde ‘wiebelbeweging’ teweegbrengt bij de ster die om hem heen draait. \nGegevens van de Very Large Telescope (VLT) van de Europese Zuidelijke Sterrenwacht (ESO) zijn gebruikt om de massa van het zwarte gat te bevestigen: het blijkt maar liefst 33 keer zo zwaar te zijn als de zon. Stellaire zwarte gaten ontstaan door het ineenstorten van zware sterren. De exemplaren die eerder in het Melkwegstelsel zijn aangetroffen zijn gemiddeld ongeveer tien keer zo zwaar als de zon. Zelfs het op één na zwaarste stellaire zwarte gat dat in de Melkweg is ontdekt\, Cygnus X-1\, blijft steken op slechts 21 zonsmassa’s\, waarmee de nieuwe ontdekking dus uitzonderlijk mag worden genoemd. Opmerkelijk is ook dat het nu ontdekte zwarte gat heel dichtbij is. Het bevindt zich op slechts 2000 lichtjaar afstand in het sterrenbeeld Arend en is daarmee het op één na meest nabije zwarte gat dat we kennen. Het object\, dat Gaia BH3 of kortweg BH3 wordt genoemd\, werd ontdekt terwijl het team bezig was om Gaia-waarnemingen te evalueren voor een komende data-release. ‘Dat er in onze omgeving een zwart gat van deze massa onopgemerkt heeft kunnen blijven\, kwam voor iedereen als een verrassing’\, zegt Pasquale Panuzzo\, lid van de Gaia-samenwerking en astronoom aan de Sterrenwacht van Parijs\, die deel uitmaakt van het Franse Nationaal Centrum voor Wetenschappelijk Onderzoek (CNRS). ‘Dit is het soort ontdekking dat je maar één keer in je actieve loopbaan doet.’ \nOm hun ontdekking te bevestigen\, gebruikte de Gaia-samenwerking gegevens van sterrenwachten op de vaste grond\, onder meer van de Ultraviolet and Visual Echelle Spectrograph (UVES) van ESO’s VLT\, die in de Chileense Atacama-woestijn staat opgesteld. Deze waarnemingen brachten cruciale eigenschappen van de begeleidende ster aan het licht die\, samen met de Gaia-gegevens\, astronomen in staat stelden om de massa van BH3 nauwkeurig te meten. Astronomen hebben (met behulp van een andere detectiemethode) buiten ons Melkwegstelsel zwarte gaten van vergelijkbare massa’s ontdekt\, en denken dat deze kunnen ontstaan door het ineenstorten van sterren die weinig elementen zwaarder dan waterstof en helium bevatten. Van deze zogeheten metaalarme sterren wordt vermoed dat ze tijdens hun bestaan minder massa verliezen\, en daardoor meer materiaal overhouden om na hun dood zwarte gaten van hoge massa te kunnen produceren. Maar tot nu toe was er geen bewijs dat een rechtstreeks verband legt tussen metaalarme sterren en zware zwarte gaten. Sterparen hebben vaak ongeveer dezelfde samenstelling\, wat betekent dat de begeleider van BH3 belangrijke aanwijzingen bevat over de ster die ineenstortte tot dit bijzondere zwarte gat. De UVES-gegevens laten zien dat de begeleider een zeer metaalarme ster moet zijn geweest en dat de ster waaruit BH3 is voortgekomen eveneens metaalarm was – precies zoals voorspeld. \nDe resultaten van het onderzoek onder leiding van Panuzzo zijn vandaag in Astronomy & Astrophysics gepubliceerd. ‘Vanwege het unieke karakter van de ontdekking\, hebben we de uitzonderlijke stap genomen om dit artikel op basis van voorlopige gegevens te publiceren\, voordat de volgende data-release van Gaia gereed is\,’ zegt medeauteur Elisabetta Caffau\, die eveneens lid is van de Gaia-samenwerking en verbonden is aan de Sterrenwacht van Parijs. Door de gegevens eerder beschikbaar te stellen\, kunnen andere astronomen nu al beginnen met het bestuderen van dit zwarte gat\, zonder op de definitieve publicatie van data-release\, die op zijn vroegst voor eind 2025 gepland staat\, te hoeven wachten. Verdere waarnemingen van dit stersysteem kunnen meer onthullen over zijn geschiedenis en over het zwarte gat zelf. Het GRAVITY-instrument van ESO’s  VLT Interferometer zou astronomen bijvoorbeeld kunnen helpen om te onderzoeken of dit zwarte gat materie uit zijn omgeving aantrekt\, en dit fascinerende object zo beter te leren begrijpen. \nLinks:\nZwaarste stellaire zwarte gat in ons Melkwegstelsel ontdekt \nSleeping giant surprises Gaia scientists \nMost massive stellar black hole in our galaxy found \nWetenschappers ontdekken grootste stellaire zwarte gat van de Melkweg \n33 keer zwaarder dan de zon: kolossaal zwart gat “dicht bij” aarde ontdekt
URL:https://www.a3veen.nl/event/zwaarste-stellaire-zwarte-gat-in-ons-melkwegstelsel-ontdekt-discovery-of-a-dormant-33-solar-mass-black-hole-in-pre-release-gaia-astrometry-publication/
CATEGORIES:Astronomie,Zwart gat
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240417T230000
DTEND;TZID=Europe/Amsterdam:20240418T060000
DTSTAMP:20260601T060449
CREATED:20240417T081353Z
LAST-MODIFIED:20240417T081555Z
UID:106272-1713394800-1713420000@www.a3veen.nl
SUMMARY:Meteorenzwerm α-Virginiden in april 2024
DESCRIPTION:De meteorenzwerm α-Virginiden bereikt op woensdag 17 april 2024\, rond 23:00\, zijn maximum. Wanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 5 meteoren per uur vallen. \nRond 01:00 staat de radiant van de zwerm in het hoogste punt (op 36°) aan de hemel. Er is dan bij ons ieder uur slechts een enkele meteoor van deze zwerm zichtbaar. In totaal zijn er\, door meteoren van andere zwermen en sporadische meteoren\, bij donkere en heldere hemel circa 1–4 meteoren per uur zichtbaar. Op een goed donkere locatie zijn ongeveer 10% meer meteoren zichtbaar dan in dichtbevolkt gebied. De Maan is voor ongeveer 60% verlicht\, maar gaat om 05:03 onder. Rond 06:00 gaat het schemeren en om 06:37 komt de Zon op. \nLinks:\nMeteorenzwerm α-Virginiden in april 2024
URL:https://www.a3veen.nl/event/meteorenzwerm-%ce%b1-virginiden-in-april-2024/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240418T200000
DTEND;TZID=Europe/Amsterdam:20240418T213000
DTSTAMP:20260601T060449
CREATED:20240418T080619Z
LAST-MODIFIED:20240418T192257Z
UID:106343-1713470400-1713475800@www.a3veen.nl
SUMMARY:Babelsberger Sternennächte : eROSITA - Die Kartierung des heißen Universums (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). \nDas Röntgenteleskop eROSITA startete 2019 mit dem Satelliten Spektrum-Röntgen-Gamma (SRG) von Baikonur aus ins All und kartierte bis Februar 2022 den gesamten Himmel mehrmals im Röntgenbereich. Das deutsche eROSITA-Konsortium veröffentlichte seinen Anteil aus der ersten 6-monatigen Himmelsdurchmusterung. Mit 900.000 Objekten ist damit der bislang größte Katalog von Röntgenquellen wie Schwarzen Löchern\, Weißen Zwergen und Quasaren weltweit zugänglich. In diesem Vortrag stellt Georg Lamer das eROSITA-Projekt vor und präsentiert einige Highlights aus den ersten 6 Monaten der Himmeldurchmusterung. \nLinks:\nBabelsberger Sternennächte
URL:https://www.a3veen.nl/event/babelsberger-sternennachte-erosita-die-kartierung-des-heisen-universums-tv-webcast/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240421
DTEND;VALUE=DATE:20240422
DTSTAMP:20260601T060449
CREATED:20240329T024036Z
LAST-MODIFIED:20240329T225212Z
UID:105177-1713657600-1713743999@www.a3veen.nl
SUMMARY:Komeet 12P/Pons-Brooks in 2024
DESCRIPTION:De komeet 12P/Pons-Brooks bereikt het perihelium op 21 april 2024\, deze periodieke komeet heeft een sterk elliptische baan\, met een omlooptijd van circa 71.4 jaar. \nDe komeet bevindt zich tijdens het perihelium op een afstand van 0\,78 AE van de Zon en op 1\,61 AE van de Aarde. De helderheid van het object bedraagt dan magnitude +3\,4. 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. De komeet is zichtbaar aan onze ochtendhemel met een helderheid groter dan achtste magnitude tussen 3 januari en 23 maart 2024\, en aan de avondhemel tussen 3 januari en 20 april 2024. Vanaf 21 april is het object in Nederland en België vrijwel onzichtbaar. Wij zien de grootste helderheid rond 20 april: magnitude +3\,4. Er is een telescoop nodig met een diameter van tenminste 10.8 cm om het object op dat moment waar te kunnen nemen. Het meest gunstige moment om de komeet te bekijken vanuit onze streken is rond 27 maart. Het object heeft dan een helderheid van +4\,2m en een magnitudecontrast van -0\,1m\, lastig om het object met het blote oog waar te nemen\, maar een eenvoudige verrekijker (in de hand of op statief) helpt hier al bij. \nMerk op dat een diffuse komeet lastiger waar te nemen is dan een ster met dezelfde helderheid. De dichtste nadering van 12P/Pons-Brooks tot de Aarde gebeurt rond 1 juni. De afstand bedraagt dan 1\,55 AE\, circa 231 miljoen km. De komeet beweegt vóór de periheliumpassage onder andere door de sterrenbeelden Zwaan\, Hagedis\, Andromeda\, Vissen\, Ram en Stier. 12P/Pons-Brooks werd op 12 juli 1812 ontdekt door Jean-Louis Pons. Onafhankelijk daarvan ontdekte Vincent Wisniewski de komeet op 1 augustus en Alexis Bouvard op 2 augustus in hetzelfde jaar. Men vermoedde toen al dat de omloop tussen de 65 en 70 jaar lag. Later bepaalde Johann Franz Encke de definitieve baan met een omlooptijd van 70\,68 jaar. In 1882 zocht men tevergeefs naar de komeet. In 1883 werd hij bij toeval ontdekt door William Robert Brooks en pas later geïdentificeerd als dezelfde komeet. In 1954 werd de komeet weer gezien. De volgende passage is uitgerekend op 2 juni 2024. Carl Sagan stelde de theorie dat 12P/Pons-Brooks de grote komeet is die de Chinezen beschreven in 1486 v. Chr. \nLinks:\nKomeet 12P/Pons-Brooks in 2024 \n12P/Pons-Brooks – Small-Body Database
URL:https://www.a3veen.nl/event/komeet-12p-pons-brooks-in-2024/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240422T110000
DTEND;TZID=Europe/Amsterdam:20240422T170000
DTSTAMP:20260601T060449
CREATED:20240422T080439Z
LAST-MODIFIED:20240422T080439Z
UID:106597-1713783600-1713805200@www.a3veen.nl
SUMMARY:Meteorenzwerm Lyriden in april 2024
DESCRIPTION:De meteorenzwerm Lyriden bereikt op maandag 22 april 2024\, rond 11:00\, zijn maximum\, de meteoren van de Lyriden zijn snel en helder en vertonen soms vuurbollen. \nWanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 13 meteoren per uur vallen. De radiant van de zwerm staat rond 06:00 in het hoogste punt aan de hemel\, op 71° boven de horizon. Het beste moment om Lyriden waar te nemen is op 22 april rond 05:00. De radiant van de zwerm staat dan ongeveer 69° boven de horizon\, in het zuidzuidoosten. Door de matige omstandigheden zijn er in onze streken dan vermoedelijk maar 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 1–5 meteoren per uur zichtbaar. De Maan is voor ongeveer 95% verlicht en is een flinke stoorzender; dit jaar zijn hierdoor alleen de helderste meteoren zichtbaar. Rond 05:45 gaat het schemeren en om 06:27 komt de Zon op. \nLinks:\nDe meteorenzwerm Lyriden in april 2024
URL:https://www.a3veen.nl/event/meteorenzwerm-lyriden-in-april-2024/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240423
DTEND;VALUE=DATE:20240424
DTSTAMP:20260601T060449
CREATED:20240428T225908Z
LAST-MODIFIED:20240429T112925Z
UID:106985-1713830400-1713916799@www.a3veen.nl
SUMMARY:Our High-Energy Universe: 15 Years with the Fermi Gamma-ray Space Telescope - publication
DESCRIPTION:To commemorate a milestone anniversary for NASA’s Fermi spacecraft\, the mission team has published an e-book called “Our High-Energy Universe: 15 Years with the Fermi Gamma-ray Space Telescope”\, readers can download the e-book in PDF and EPUB formats. The e-book is aimed at general audiences with an interest in space. \nLaunched on June 11\, 2008\, Fermi detects gamma rays\, the highest-energy form of light\, from Earth’s atmosphere to far-flung galaxies and cosmic phenomena in between\, its research has uncovered details on topics ranging from solar flares to star formation and the mysteries at the center of our Milky Way. Through images\, fun facts\, and launch-day memories\, the e-book tells Fermi’s story from conceptualization to launch and recounts some of the mission’s groundbreaking discoveries. By delving into high-energy astrophysics topics like gamma-ray bursts and blazars\, readers can explore Fermi’s universe and what questions remain open for investigation in its next chapter. Fermi was originally called the Gamma-ray Large Area Space Telescope but was renamed after Italian physicist Enrico Fermi in August 2008. “Enrico Fermi’s science has been important for understanding the sources that the Fermi telescope sees\,” said Elizabeth Hays\, the mission’s project scientist at NASA’s Goddard Space Flight Center in Greenbelt\, Maryland. “The gamma-ray sky is powered by particle acceleration mechanisms he theorized about.” The satellite has two gamma-ray detectors: the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). The LAT observes a fifth of the gamma-ray sky at any time\, detecting high-energy light with energies ranging from 20 million to over 300 billion electron volts (The energy of visible light is 2 to 3 electron volts). \n The GBM views about 70% of the sky at a time at lower energies\, searching for brief flashes of gamma-ray light. The result of this carefully crafted duo is the most sensitive gamma-ray observatory in orbit\, equipped to study the universe’s highest-energy phenomena near and far. By peering through Fermi’s gamma-ray eyes\, we can better understand our solar system. Within its first eight years of operation\, Fermi detected gamma-ray emissions from 40 solar flares — bursts of energy from the Sun. Some even originated on the Sun’s far side\, allowing scientists to analyze how charged particles fired by solar flares can arc from one side of the Sun to produce gamma rays on the other. In studying our Milky Way\, Fermi found two lobes of high-energy gamma rays — called the Fermi Bubbles — extending above and below the galaxy’s center. Each bubble stands 25\,000 light-years tall. Astronomers think the bubbles formed following an ancient burst of activity from the Milky Way’s central supermassive black hole. Fermi helps scientists understand black holes in other galaxies\, too. “As a black hole forms\, either from the death of a massive star or the collision of two neutron stars\, it creates a brief flash of light called a gamma-ray burst\,” said Judith Racusin\, Fermi’s deputy project scientist at Goddard. \n“Fermi detects about one burst a day and has helped revolutionize our understanding of these phenomena.” Even after 15 years of accomplishments\, however\, many mysteries remain for Fermi to tackle. One of the telescope’s ongoing objectives is to study the composition of dark matter — the mysterious substance that makes up about 25% of the universe. Because dark matter doesn’t reflect\, absorb\, or emit light\, scientists remain unsure of its composition. One popular theory suggests\, though\, that dark matter particles create gamma rays when they interact. If Fermi can spot this high-energy signature\, it might help scientists learn more about dark matter’s makeup. If there’s one thing Fermi has taught us\, it’s to expect the unexpected. Gamma-ray research has yielded unprecedented breakthroughs in our understanding of the Milky Way’s central black hole\, our flaring Sun\, and merging neutron stars. As much as we anticipate the next gamma-ray revelation\, only time will tell what exactly Fermi has in store. Fermi is an astrophysics and particle physics partnership managed by Goddard. Fermi was developed in collaboration with the U.S. Department of Energy\, with important contributions from academic institutions and partners in France\, Germany\, Italy\, Japan\, Sweden\, and the United States. \n\n\n\nLinks:\nExplore the Universe with the First E-Book from NASA’s Fermi
URL:https://www.a3veen.nl/event/our-high-energy-universe-15-years-with-the-fermi-gamma-ray-space-telescope-publication/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240424T000000
DTEND;TZID=Europe/Amsterdam:20240424T010000
DTSTAMP:20260601T060449
CREATED:20240421T134721Z
LAST-MODIFIED:20240912T151006Z
UID:106572-1713916800-1713920400@www.a3veen.nl
SUMMARY:Advanced Composite Solar Sail System
DESCRIPTION:A NASA mission testing a new way of navigating our solar system is ready to hoist its sail into space – not to catch the wind\, but the propulsive power of sunlight\, the Advanced Composite Solar Sail System is targeting launch on Tuesday\, April 23\, 2024 (Wednesday\, April 24 in New Zealand\, the launch window opens at 00:00 April 24 MEST)\, aboard a Rocket Lab Electron rocket from the company’s Launch Complex 1 on the Mahia Peninsula of New Zealand. \nRocket Lab’s Electron rocket will deploy the mission’s CubeSat about 1\,000 kilometers above Earth – more than twice the altitude of the International Space Station. To test the performance of NASA’s Advanced Composite Solar Sail System\, the spacecraft must be in a high enough orbit for the tiny force of sunlight on the sail – roughly equivalent to the weight of a paperclip resting on your palm – to overcome atmospheric drag and gain altitude. After a busy initial flight phase\, which will last about two months and includes subsystems checkout\, the microwave oven-sized CubeSat will deploy its reflective solar sail. The weeks-long test consists of a series of pointing maneuvers to demonstrate orbit raising and lowering\, using only the pressure of sunlight acting on the sail. After reaching its Sun-synchronous orbit the spacecraft will begin unrolling its composite booms\, which span the diagonals of the polymer sail\, measuring about 80 square meters. Spacecraft-mounted cameras will capture the sail’s big moment\, monitoring its shape and symmetry during deployment. With its large sail\, the spacecraft may be visible from Earth if the lighting conditions are just right. Once fully expanded and at the proper orientation\, the sail’s reflective material will be as bright as Sirius\, the brightest star in the night sky. \n\n \nhttps://nasa.tumblr.com/post/748579343742140416/setting-sail-to-travel-through-space-5-things-to\n\n\nLinks:\nNASA to Hoist Its Sail: Solar Sail Mission Gets Ready for Launch \nNASA Next-Generation Solar Sail Boom Technology Ready for Launch
URL:https://www.a3veen.nl/event/advanced-composite-solar-sail-system/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240426T202000
DTEND;TZID=Europe/Amsterdam:20240426T214500
DTSTAMP:20260601T060449
CREATED:20240424T155238Z
LAST-MODIFIED:20240424T155238Z
UID:106772-1714162800-1714167900@www.a3veen.nl
SUMMARY:Discourse: Decoding the cosmos
DESCRIPTION:Just a century ago\, observational evidence established the existence of other galaxies besides our own. \nSoon afterwards\, it was discovered that the Universe is expanding\, driving a profound change in our understanding of the cosmos. In 1998\, the prevailing cosmological paradigm was again upended by the discovery that the Universe’s expansion is accelerating. Since then\, the remarkable progress in cosmology\, spanning Peiris’s research career\, has been driven by the close interplay between theory and observations. Observational discoveries have led to a Standard Model of cosmology with ingredients not present in the standard model of particle physics – dark matter\, dark energy\, and a primordial origin for cosmic structure. The physical nature of these ingredients remains a mystery. The race to unravel this cosmic puzzle is now underway\, motivating a new generation of ambitious sky surveys across the electromagnetic spectrum and using new messengers such as gravitational waves. Peiris will describe some highlights from her journey through this rapidly changing cosmological landscape in this discourse. She will also discuss how laboratory experiments are helping us test new fundamental physics paradigms developed to explain cosmological observations. \nLinks:\nDiscourse: Decoding the cosmos
URL:https://www.a3veen.nl/event/discourse-decoding-the-cosmos/
LOCATION:The Royal Institution of Great Britain\, 21 Albemarle Street\, London\, Verenigd Koninkrijk
CATEGORIES:Astronomie,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240501
DTEND;VALUE=DATE:20240502
DTSTAMP:20260601T060449
CREATED:20240501T120858Z
LAST-MODIFIED:20241108T140027Z
UID:115764-1714521600-1714607999@www.a3veen.nl
SUMMARY:An independent hybrid imaging of Sgr A* from the data in EHT 2017 observations - publication
DESCRIPTION:1st image of our Milky Way’s black hole may be inaccurate\, scientists say. \nWhat does the supermassive black hole lurking at the center of our galaxy look like? It’s a deceptively simple question. Although our local cosmic abyss\, named Sgr A* (short for Sagittarius A*)\, resides just 26\,000 light-years from Earth\, it has proven to be a very difficult object to image. This is thanks in part to material whipping around it at near light-speeds. However\, after years of trying\, scientists with the Event Horizon Telescope (EHT) project succeeded in 2022.The black hole’s silhouette emerged from the shadows\, appearing like a fuzzy orange doughnut. Yet now\, an independent analysis of the EHT data suggests part of the image’s doughnut-like appearance may be an artifact due to the way it was put together. This discovery owes itself to  a trio of scientists at the National Astronomical Observatory of Japan (NAOJ). \nLinks:\n1st image of our Milky Way’s black hole may be inaccurate\, scientists say \nFirst Image of Milky Way Black Hole May Be Actually Be Entirely Wrong
URL:https://www.a3veen.nl/event/an-independent-hybrid-imaging-of-sgr-a-from-the-data-in-eht-2017-observations-publication/
CATEGORIES:Astronomie,Zwart gat
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240503
DTEND;VALUE=DATE:20240504
DTSTAMP:20260601T060449
CREATED:20240503T075037Z
LAST-MODIFIED:20240503T075037Z
UID:107263-1714694400-1714780799@www.a3veen.nl
SUMMARY:World Sun Day 2024
DESCRIPTION:On May 3rd\, the whole world annually celebrates the Sun Day. \nSun Day was designated in 1978 by United States President Jimmy Carter\, specifically devoted to advocacy for solar power\, following a joint resolution by Congress\, H.J.Res. 715 becoming Pub. L.Tooltip Public Law (United States) 95–253. It was modeled on the highly successful Earth Day of April 22\, 1970. It was the idea of Denis Hayes\, who also coordinated Earth Day in 1970. The date became an international event in 1994\, initiated by the European Section of the International Solar Energy Society (ISES). \nLinks:\nMay 3rd – International Sun Day
URL:https://www.a3veen.nl/event/world-sun-day-2024/
CATEGORIES:Zon
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240506
DTEND;VALUE=DATE:20240507
DTSTAMP:20260601T060449
CREATED:20240506T071522Z
LAST-MODIFIED:20240506T111230Z
UID:107446-1714953600-1715039999@www.a3veen.nl
SUMMARY:Radio-astronomen omzeilen storende aardatmosfeer met nieuwe kalibratietechniek / Characterisation of the decameter sky at sub-arcminute resolution - publication / publicatie
DESCRIPTION:Oud (links) versus nieuw. (c) LOFAR/Groeneveld et al.\nEen internationaal team van onderzoekers\, onder leiding van Leidse sterrenkundigen\, heeft voor het eerst scherpe radiokaarten gemaakt van het heelal op lage frequenties. \nDankzij een nieuwe kalibratietechniek omzeilden ze de verstoringen van de aardse ionosfeer. Met de nieuwe methode bestudeerden ze plasma’s van oude uitbarstingen van zwarte gaten. Mogelijk is de techniek geschikt om exoplaneten vinden die om kleine sterren draaien. De onderzoekers publiceren hun techniek in Nature Astronomy. \nLinks:\nRadio-astronomen omzeilen storende aardatmosfeer met nieuwe kalibratietechniek
URL:https://www.a3veen.nl/event/radio-astronomen-omzeilen-storende-aardatmosfeer-met-nieuwe-kalibratietechniek-characterisation-of-the-decameter-sky-at-sub-arcminute-resolution-publication-publicatie/
CATEGORIES:Astronomie,Radiotechniek
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240506
DTEND;VALUE=DATE:20240507
DTSTAMP:20260601T060449
CREATED:20240506T115810Z
LAST-MODIFIED:20240520T115853Z
UID:108099-1714953600-1715039999@www.a3veen.nl
SUMMARY:NASA Simulation’s Plunge Into a Black Hole: Explained - publication
DESCRIPTION:Ever wonder what happens when you fall into a black hole? \nThanks to an immersive visualization produced on a NASA supercomputer\, viewers can plunge into the event horizon\, a black hole’s point of no return. The visualizations are available in multiple forms. Explainer videos act as sightseeing guides\, illuminating the bizarre effects of Einstein’s general theory of relativity. Versions rendered as 360-degree videos let viewers look all around during the trip\, while others play as flat all-sky maps. To create the visualizations\, Schnittman teamed up with fellow Goddard scientist Brian Powell and used the Discover supercomputer at the NASA Center for Climate Simulation. The project generated about 10 terabytes of data — equivalent to roughly half of the estimated text content in the Library of Congress — and took about 5 days running on just 0.3% of Discover’s 129\,000 processors. The same feat would take more than a decade on a typical laptop. The destination is a supermassive black hole with 4.3 million times the mass of our Sun\, equivalent to the monster located at the center of the Milky Way galaxy. \nLinks:\nNew NASA Black Hole Visualization Takes Viewers Beyond the Brink
URL:https://www.a3veen.nl/event/nasa-simulations-plunge-into-a-black-hole-explained-publication/
CATEGORIES:Astronomie,Zwart gat
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240506
DTEND;VALUE=DATE:20240507
DTSTAMP:20260601T060449
CREATED:20240506T140949Z
LAST-MODIFIED:20240605T194327Z
UID:108754-1714953600-1715039999@www.a3veen.nl
SUMMARY:Project Hephaistos – II. Dyson sphere candidates from Gaia DR3\, 2MASS\, and WISE - publication
DESCRIPTION:Astronomers find 60 Dyson sphere megastructure candidates among millions of searched stars. \nDyson spheres are gargantuan artificial structures\, built by extraterrestrial civilizations around around their stars\, with the goal of capturing energy. First proposed in 1960 by physicist Freeman Dyson\, they are an incredible thought experiment. Two teams of astronomers in Sweden and Italy recently conducted a new search for possible evidence of Dyson spheres. The astronomers examined 5 million stars\, up to 6\,500 light-years away and found 60 possible candidate stars. The stars\, both red dwarfs (or M dwarfs) and larger ones including sun-like stars\, are emitting up to 60 times more infrared heat than scientists expected. The results fit with what astronomers would expect to see from Dyson spheres. The teams found the candidates in the latest Gaia DR3 data from the European Gaia satellite as well as the Two Micron All Sky Survey (2MASS) and Wide-field Infrared Survey Explorer (WISE). The researchers said it is difficult to explain the observations with currently known natural processes. And even if the process is most likely a previously unknown natural phenomenon\, it’s still a fascinating discovery. \nLinks:\nAstronomers find 60 Dyson sphere candidates\, among millions of searched stars \nAlien ‘Dyson sphere’ megastructures could surround at least 7 stars in our galaxy\, new studies suggest \nBackground Contamination of the Project Hephaistos Dyson Spheres Candidates \nProject Hephaistos
URL:https://www.a3veen.nl/event/project-hephaistos-ii-dyson-sphere-candidates-from-gaia-dr3-2mass-and-wise-publication/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240506T200000
DTEND;TZID=Europe/Amsterdam:20240506T213000
DTSTAMP:20260601T060449
CREATED:20240424T020325Z
LAST-MODIFIED:20240424T120539Z
UID:106747-1715025600-1715031000@www.a3veen.nl
SUMMARY:Hendrik de Waard Lecture : Our Universe Through the James Webb Space Telescope
DESCRIPTION:Where did we come from? What path leads us through the 13.8-billion-year history of the Universe\, connecting the particles and energy of the Big Bang to the formation of galaxies like the Milky Way\, stars like the Sun and planets like the Earth? \nThe James Webb Space Telescope\, built by NASA in partnership with the European and Canadian Space Agencies\, was designed to answer fundamental questions about the origins of galaxies\, stars and planets\, and to help us find our place in the Universe. Webb was launched on Christmas Day 2021 after 25 years of planning\, design\, development\, construction\, and testing. In this year’s Hendrik de Waard Lecture\, Jonathan P. Gardner will discuss why the first science results from Webb have engaged the public and surprised the scientists\, and which additional results can be expected in the years to come. \nLinks:\nHendrik de Waard Lecture : Our Universe Through the James Webb Space Telescope
URL:https://www.a3veen.nl/event/hendrik-de-waard-lecture-our-universe-through-the-james-webb-space-telescope/
LOCATION:RUG Academy Building Groningen\, Broerstraat 5\, Groningen\, Nederland
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240507
DTEND;VALUE=DATE:20240509
DTSTAMP:20260601T060449
CREATED:20240507T145604Z
LAST-MODIFIED:20240508T152047Z
UID:107550-1715040000-1715212799@www.a3veen.nl
SUMMARY:2024 #HumansToMars Summit
DESCRIPTION:H2M 2024 will focus on questions that include:\n\nDo we have a viable mission architecture plan for Mars?\nWhat are the most significant technological hurdles (or long poles) that need to be overcome before humanity steps on the surface of Mars?\nDo we have an adequate pipeline of skilled workers to build our future in space?\nHow can governments and commercial industry collaborate to enable a human presence on Mars?\nCan we send humans to Mars in 2033?\nHow can innovations from Mars-focused R&D drive value and improvement on Earth\, and how can stakeholders contribute?\nWhat are the major Mars science achievements over the past year – and what are our objectives before humans first step foot on the surface?\nHow can we most effectively protect the physical and mental health of astronauts voyaging to and from Mars?\n\n\nLinks:\nHumans to Mars Summit
URL:https://www.a3veen.nl/event/2024-humanstomars-summit/
LOCATION:Washington DC\, Washington DC\, Verenigde Staten
CATEGORIES:Astronomie,Mars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240507T100000
DTEND;TZID=Europe/Amsterdam:20240507T110000
DTSTAMP:20260601T060449
CREATED:20240503T070351Z
LAST-MODIFIED:20240507T124959Z
UID:107300-1715076000-1715079600@www.a3veen.nl
SUMMARY:Meteorenzwerm η-Aquariden in mei 2024
DESCRIPTION:De meteorenzwerm η-Aquariden bereikt op dinsdag 7 mei 2024\, rond 10:00\, zijn maximum. \nDe meteoren van de η-Aquariden zijn snel en hebben nalichtende sporen. Wanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 30 meteoren per uur vallen. De radiant van de zwerm staat rond 09:00 in het hoogste punt aan de hemel\, op 37° boven de horizon. Het beste moment om η-Aquariden waar te nemen is op 8 mei rond 04:45. De radiant staat op dat moment zo’n 14° boven de oostzuidoostelijke horizon; niet erg gunstig. Er is dan bij ons ieder uur niet meer dan één meteoor zichtbaar van deze zwerm. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 3–8 meteoren per uur zichtbaar. De Maan komt om 05:43 op\, is voor ongeveer 0% verlicht en stoort niet. Rond 05:15 gaat het schemeren en om 05:56 komt de Zon op. \nLinks:\nMeteorenzwerm η-Aquariden in mei 2024 \nEta Aquarid meteor shower 2024: Where\, when and how to see it
URL:https://www.a3veen.nl/event/meteorenzwerm-%ce%b7-aquariden-in-mei-2024/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240513T230000
DTEND;TZID=Europe/Amsterdam:20240513T233000
DTSTAMP:20260601T060449
CREATED:20240513T080014Z
LAST-MODIFIED:20240513T080638Z
UID:107694-1715641200-1715643000@www.a3veen.nl
SUMMARY:The Sky at Night - Hiding in Starlight (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:\nTotal solar eclipses\, like the one seen last month in North America\, allow us to see details of the Sun that can’t be seen at any other time. So\, this month\, The Sky at Night team looks at how scientists are creating eclipses on demand and discovering the secrets that can be revealed hidden in that starlight\, including habitable planets like our own. Maggie Aderin-Pocock travels to Belgium\, where the European Space Agency’s Proba-3 mission is going through its final testing stages. This groundbreaking mission aims to fly two satellites together in formation\, with one satellite acting like the moon during an eclipse\, blocking out the central light of the Sun. This allows the other satellite to image the corona\, the Sun’s outer atmosphere as seen during an eclipse. Maggie meets Dr Damien Galano from ESA\, who tells her all about the challenges of the mission and what it hopes to achieve. Maggie then goes on to meet satellite operations test engineer Marie Beeckman\, who takes her up close to the satellites to find out how the testing is going. Meanwhile\, Pete Lawrence is out and about in Bristol\, meeting a team of scientists and amateur astronomers. He discovers how input from the amateurs was crucial to the discovery of two exoplanets colliding\, which had caused the dimming of a star. Finally\, Chris Lintott is in Glasgow meeting Professor Beth Biller from Edinburgh University to discover why it is only by creating eclipses of distant stars that we could potentially find exoplanets more like our own. And as ever\, our resident astronomer\, Pete Lawrence\, guides us through what can be seen this coming month\, with a particular focus on the rewards of viewing in daylight – but as always\, he reminds us of the need to take care when doing this.\n\nLinks:\nThe Sky at Night
URL:https://www.a3veen.nl/event/the-sky-at-night-hiding-in-starlight-tv-bbc-four/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240516T190000
DTEND;TZID=Europe/Amsterdam:20240516T203000
DTSTAMP:20260601T060449
CREATED:20240516T084218Z
LAST-MODIFIED:20240516T093044Z
UID:107879-1715886000-1715891400@www.a3veen.nl
SUMMARY:Babelsberger Sternennächte : A simple Recipe to make a Galaxy (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 auf dem YouTube-Kanal von Urknall\, Weltall und das Leben ausgestrahlt wird (Playlist). \nGalaxien gibt es in verschiedenen Formen und Größen\, aber genau wie bei Kuchen oder Torten sind die Grundzutaten immer die gleichen. Die Wissenschaftlerin erklärt in ihrem Vortrag\, wie sich die Galaxien trotzdem unterscheiden\, welche Mechanismen die Entstehung und Entwicklung von Galaxien vorantreiben und ihre Struktur und ihr Aussehen beeinflussen. Sie geht dabei auch auf Wechselwirkungen der Galaxien miteinander ein und wie sich diese auf ihre Art und Größe auswirken. \nSobald 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 \nVirtual lecture: Babelsberg Starry Night on 16 May 2024
URL:https://www.a3veen.nl/event/babelsberger-sternennachte-tv-webcast-20240516/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240518
DTEND;VALUE=DATE:20240519
DTSTAMP:20260601T060449
CREATED:20240516T152816Z
LAST-MODIFIED:20240518T141525Z
UID:107911-1715990400-1716076799@www.a3veen.nl
SUMMARY:Astronomy Day Spring 2024
DESCRIPTION:Astronomy Day is an annual event in various countries\, intended to provide a means of interaction between the general public and various astronomy enthusiasts\, groups and professionals. \nThe lunar influence on the schedule means that the events happen on a different date each year\, rather than set calendar dates. This event was started in 1973 by Doug Berger\, the president of the Astronomical Association of Northern California. His intent was to set up various telescopes in busy urban locations so that passersby could enjoy views of the heavens. Since then the event has expanded and is now sponsored by a number of organizations associated with astronomy. In 2007\, an autumn Astronomy Day was added. It was scheduled to occur on a Saturday between mid-September and mid-October so as to be on or close to the first quarter Moon. \nLinks:\nAstronomy Day Spring 2024
URL:https://www.a3veen.nl/event/astronomy-day-may-2024/
CATEGORIES:Astronomie
END:VEVENT
END:VCALENDAR