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DTSTART;TZID=Europe/Amsterdam:20230911T223000
DTEND;TZID=Europe/Amsterdam:20230911T230000
DTSTAMP:20260601T233658
CREATED:20230911T085936Z
LAST-MODIFIED:20230911T090514Z
UID:94703-1694471400-1694473200@www.a3veen.nl
SUMMARY:The Sky at Night : The Very Large Telescope (TV BBC Four)
DESCRIPTION:The Sky at Night is a monthly documentary television programme on astronomy produced by the BBC. \nThe show had the same permanent presenter\, Patrick Moore\, from its first broadcast on 24 April 1957 until 7 January 2013. The latter date was a posthumous broadcast\, which followed Moore’s death on 9 December 2012. This made it the longest-running programme with the same presenter in television history. Many early episodes are missing\, either because the tapes were wiped\, thrown out\, or because the episode was broadcast live and never recorded in the first place. Beginning with the 3 February 2013 edition\, the show was co-presented by Lucie Green and Chris Lintott. Since December 2013 Maggie Aderin-Pocock has been a presenter. The programme’s opening and closing theme music is “At the Castle Gate”\, from the incidental music to Pelléas et Mélisande\, written in 1905 by Jean Sibelius\, performed by the Royal Philharmonic Orchestra and conducted by Sir Thomas Beecham. \nThis episode:\nThe Very Large Telescope – or VLT – has been responsible for some of the greatest astronomical breakthroughs of all time\, discoveries that have resulted in Nobel Prizes and transformed our understanding of the cosmos. The Sky at Night team travels to the heart of Chile’s Atacama Desert to explore one of the most advanced observatories in the world – a site at the forefront of ground-based optical astronomy. \nThe Very Large Telescope\, or VLT\, is located at the Paranal Observatory\, in the Atacama Desert\, one of the driest places on earth apart from the North and South Poles\, which makes it the perfect place for an observatory because there is little moisture in the air distorting the view of the stars. \nThe VLT is actually made up of four main telescopes that can be used individually or have their observing power combined. Each telescope contains a huge 8.2 metre mirror at its heart\, designed to capture as much light as possible\, and the images obtained from the ground are almost as sharp as those obtained in space. \nIn this episode\, Maggie meets some of the scientists\, engineers and astronomers working at this extraordinary site. Her journey begins by meeting the head of maintenance\, support and engineering\, Maxime Boccas. He is leading the operation of something that only happens once every two years – the cleaning of the mirrors. Maxime explains the incredible way these huge and delicate mirrors are cleaned and maintained – including the way aluminium particles are vaporised to create perfectly reflective surfaces. \nSomeone using the incredible telescopes for their work is astronomer Dr Joe Anderson. Along with other scientists\, Joe uses the VLT’s specialised instruments – devices that analyse light from the universe\, helping scientists to see and better understand the cosmos. Joe explains that the VLT is the world’s most advanced visible-light astronomical observatory\, and its huge mirrors and range of instruments mean astronomers can get readings across a broad range of spectrums\, which has led to a lot of new discoveries regarding exoplanets\, black holes and gamma ray bursts. \nThe VLT is a huge site in the middle of a desert\, so Maggie next meets Vanessa Peidro\, the head of logistics and responsible for maintaining not just the buildings and vehicles but also managing food\, water and other facilities that cater for 150-160 people on site at any one time. \nMaggie then meets physicist Francoise Delplancke-Stroebele and her colleague Frederic Gonte. They are leading the VLT’s next upgrade\, Gravity+\, and explain how the four massive telescopes at the VLT work in unison by combining light waves in a technique called interferometry. This technique is used by astronomer Dr Abigail Frost\, who explains how interferometry helped in the recent discovery of a rare so-called ‘vampire star’. \nThe VLT is still a world-class observatory with cutting-edge research\, but the site will soon transform into an even more powerful observatory. The Extremely Large Telescope\, or ELT\, is currently in construction. Maggie gets a sneak peek at what will be\, when it’s completed in five years’ time\, the biggest optical telescope in the world. Built on top of a mountain and the size of a cathedral\, the ELT has to be one of the most spectacular and complex feats of engineering in the world. \nLinks:\nThe Sky at Night
URL:https://www.a3veen.nl/event/the-sky-at-night-the-very-large-telescope-tv-bbc-four/
CATEGORIES:Astronomie,Cultuur,TV
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230914
DTEND;VALUE=DATE:20230915
DTSTAMP:20260601T233658
CREATED:20230914T200133Z
LAST-MODIFIED:20251114T145924Z
UID:94954-1694649600-1694735999@www.a3veen.nl
SUMMARY:NASA : UAP Independent Study Team - Final Report - publication
DESCRIPTION:On September 14\, 2023\, the NASA Unidentified Anomalous Phenomena Independent Study Team published its final report containing a series of recommendations for how the agency could help to move our understanding of UAP forward. \nLinks:\nNASA Unidentified Anomalous Phenomena Independent Study \nNASA Shares Unidentified Anomalous Phenomena Independent Study Report
URL:https://www.a3veen.nl/event/nasa-uap-independent-study-team-final-report-publication/
CATEGORIES:Astronomie,UAP/UFO
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231001
DTEND;VALUE=DATE:20231002
DTSTAMP:20260601T233658
CREATED:20231029T145415Z
LAST-MODIFIED:20231029T162930Z
UID:97679-1696118400-1696204799@www.a3veen.nl
SUMMARY:Study finds the Universe is a black hole (kind of) / All objects and some questions - publication
DESCRIPTION:The paper ‘All objects and some questions‘ presents an overview of the thermal history of the Universe and the sequence of objects (e.g.\, protons\, planets\, and galaxies) that condensed out of the background as the Universe expanded and cooled. \nThe authors plot the density and temperature of the Universe as a function of time and the masses and sizes of all objects in the Universe. These comprehensive pedagogical plots draw attention to the triangular regions forbidden by general relativity and quantum uncertainty and help navigate the relationship between gravity and quantum mechanics. How can we interpret their intersection at the smallest possible objects: Planck-mass black holes (“instantons”)? Does their Planck density and Planck temperature make them good candidates for the initial conditions of the Universe? Our plot of all objects also seems to suggest that the Universe is a black hole. The writers explain how this depends on the unlikely assumption that our Universe is surrounded by zero density Minkowski space. \nLinks:\nStudy finds the Universe is a black hole (kind of)
URL:https://www.a3veen.nl/event/all-objects-and-some-questions-publication/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231001
DTEND;VALUE=DATE:20250101
DTSTAMP:20260601T233658
CREATED:20230812T235221Z
LAST-MODIFIED:20231012T115731Z
UID:93378-1696118400-1735689599@www.a3veen.nl
SUMMARY:Heliophysics Big Year
DESCRIPTION:The Heliophysics Big Year is a global celebration of solar science and the Sun’s influence on Earth and the entire solar system. \nDuring the Heliophysics Big Year\, you will have the opportunity to participate in many solar science events such as watching solar eclipses\, experiencing an aurora\, participating in citizen science projects\, and other fun Sun-related activities. Heliophysics is the study of our star and how it interacts with everything in our solar system. The “Big Year” is a concept that originated with citizen scientists in the bird-watching community. During their Big Year\, birders attempt to observe and study as many bird species as possible during a calendar year\, and we are challenging you to do the same with our Sun. \nLinks:\nThe Heliophysics Big Year \nBig Year
URL:https://www.a3veen.nl/event/heliophysics-big-year/
CATEGORIES:Astronomie,Zon
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231002
DTEND;VALUE=DATE:20231007
DTSTAMP:20260601T233658
CREATED:20230917T175728Z
LAST-MODIFIED:20231002T073636Z
UID:95118-1696204800-1696636799@www.a3veen.nl
SUMMARY:International Astronautical Congress 2023
DESCRIPTION:Every year\, the International Astronautical Federation with the support of the International Academy of Astronautics and the International Institute of Space Law (IISL)\, holds the International Astronautical Congress (IAC) which is hosted by one of the national society members of the IAF. \nThey are an annual meeting of the actors in the discipline of space\, and are generally held in late September or early October. They consist of plenary sessions\, lectures and meetings. The IAC is attended by the agency heads and senior executives of the world’s space agencies. As the Second World War came to an end\, the United States and the Soviet Union held different and competing political worldviews. As the Cold War began to take shape\, communication between the two countries became less frequent. \nBoth countries turned their focus to achieving military superiority over the other. Six years after the Iron Curtain fell\, the International Astronautical Federation (IAF) was formed by scientists from all over Europe in the field of space research in order to collaborate once more. During the years of the Space Race\, the IAF was one of the few forums where members of both East and West Europe could meet during the annual International Astronautical Congresses. \nLinks:\nInternational Astronautical Congress
URL:https://www.a3veen.nl/event/international-astronautical-congress-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231004
DTEND;VALUE=DATE:20231005
DTSTAMP:20260601T233658
CREATED:20231004T090925Z
LAST-MODIFIED:20231004T091047Z
UID:96022-1696377600-1696463999@www.a3veen.nl
SUMMARY:Spoetnik 1 lancering (1957) 2023
DESCRIPTION:Spoetnik 1 of PS-1 werd gelanceerd op 4 oktober 1957 om 22 u 48 minuten en 34 seconden\, dat moment wordt vaak gezien als de officiële start van het ruimtevaarttijdperk. \nDe Spoetnik 1 bestond uit een uiterst eenvoudig concept: een aluminium bol (gewicht 83\,6 kilogram; doormeter 58\,5 cm) met daarin een accu\, een ventilator voor de temperatuurregeling. Verder twee radiozenders (met radiobuizen in plaats van transistoren) met aan de buitenzijde vier ongeveer 3 m lange sprietvormige antennes. \nLinks:\nSputnik 1\, Earth’s First Artificial Satellite in Photos
URL:https://www.a3veen.nl/event/spoetnik-1-lancering-1957-2023/
LOCATION:Bajkonoer\, Kazachstan
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231004
DTEND;VALUE=DATE:20231011
DTSTAMP:20260601T233658
CREATED:20231004T085855Z
LAST-MODIFIED:20231004T090517Z
UID:96018-1696377600-1696982399@www.a3veen.nl
SUMMARY:World Space Week 2023
DESCRIPTION:World Space Week (WSW) is an annual holiday observed in over 90 nations throughout the world. \nThe General Assembly of the United Nations (UN) declared 4 to 10 October WSW in order to celebrate each year at the international level the contributions of space science and technology to the betterment of the human condition. 4 October 1957 was the date of the launch into outer space of the first human-made Earth satellite\, Sputnik 1\, thus opening the way for space exploration\, and the 10th of October 1967 was the date of the entry into force of the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space\, including the Moon and Other Celestial Bodies. \nSpace science and technology and their applications are increasingly being used to support a wide range of United Nations activities. At least 25 United Nations entities and the World Bank Group routinely use space applications. They make important and sometimes essential contributions to the work of the United Nations\, including in the implementation of recommendations of major world conferences and those of the Third United Nations Conference on the Exploration and Peaceful Uses of Outer Space (UNISPACE III)\, and in efforts towards sustainable development. \nAs a consequence\, coordination\, cooperation and synergy are essential for those activities to be effectively carried out by the United Nations system. The annual sessions of the Inter-Agency Meeting on Outer Space Activities are the main means of achieving that synergy. The effectiveness of the Meeting has been further enhanced by the holding\, since 2004\, of an open informal session immediately after the end of the Meeting\, as a means of engaging Member States\, in a direct and informal setting\, in important space-related developments in the United Nations system. The agenda of the Inter-Agency Meeting is reviewed at each session and adapted to current operational needs. \nLinks:\nWorld Space Week \nWorld Space Week 4-10 October
URL:https://www.a3veen.nl/event/world-space-week-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231005T220000
DTEND;TZID=Europe/Amsterdam:20231006T070000
DTSTAMP:20260601T233658
CREATED:20231005T195356Z
LAST-MODIFIED:20231022T000012Z
UID:96166-1696543200-1696575600@www.a3veen.nl
SUMMARY:Edwin Hubble identifies Cepheid variable star - 100 years ago
DESCRIPTION:Edwin Hubble proved that many objects previously thought to be clouds of dust and gas and classified as “nebulae” were actually galaxies beyond the Milky Way. \nEdwin Hubble’s arrival at Mount Wilson Observatory\, California\, in 1919 coincided roughly with the completion of the 100-inch (2.5 m) Hooker Telescope\, then the world’s largest. At that time\, the prevailing view of the cosmos was that the universe consisted entirely of the Milky Way Galaxy. Using the Hooker Telescope at Mount Wilson\, Hubble identified Cepheid variables\, a standard candle discovered in 1908 by Henrietta Leavitt. Comparing their apparent luminosity to their intrinsic luminosity gives their distance from Earth. Hubble found Cepheids in several nebulae\, including the Andromeda Nebula and Triangulum Nebula. \nHis observations\, made in 1923\, proved conclusively that these nebulae were much too distant to be part of the Milky Way and were\, in fact\, entire galaxies outside our own; thus today they are no longer considered nebulae. This was first hypothesized as early as 1755 when Immanuel Kant‘s General History of Nature and Theory of the Heavens appeared. This hypothesis was opposed by many in the astronomy establishment of the time\, in particular by Harvard University–based Harlow Shapley. Despite the opposition\, Hubble\, then a thirty-five-year-old scientist\, had his findings first published in The New York Times on November 23\, 1924\, then presented them to other astronomers at the January 1\, 1925\, meeting of the American Astronomical Society. Hubble’s results for Andromeda were not formally published in a peer-reviewed scientific journal until 1929. \nLinks:\nEdwin Hubble identifies Cepheid variable star \nAgenda – Edwin Hubble identifies Cepheid variable star \nOn the α/Fe bimodality of the M31 disks \nDESI Observations of the Andromeda Galaxy: Revealing the Immigration History of our Nearest Neighbor \nhttps://iopscience.iop.org/article/10… \nhttps://jwstfeed.com/Home/ShowFeed?se… \nhttps://webbtelescope.org/contents/me…
URL:https://www.a3veen.nl/event/edwin-hubble-identifies-cepheid-variable-star-100-years-ago/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231007T080000
DTEND;TZID=Europe/Amsterdam:20231008T170000
DTSTAMP:20260601T233658
CREATED:20231008T152637Z
LAST-MODIFIED:20231008T152741Z
UID:96279-1696665600-1696784400@www.a3veen.nl
SUMMARY:ESA Open Days 2023
DESCRIPTION:ESA Open Days 2023 is an Europe-wide series of events promises to connect space enthusiasts\, bringing space closer to them than ever before. \nUnforgettable days of discoveries\, inspiration\, and scientific divulgation await thousands of European citizens\, who are eagerly gearing up for a fantastic journey through the wonders of space. \nLinks:\nESA Open Days 2023
URL:https://www.a3veen.nl/event/esa-open-days-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231008T180000
DTEND;TZID=Europe/Amsterdam:20231009T090000
DTSTAMP:20260601T233658
CREATED:20231008T150215Z
LAST-MODIFIED:20231008T150251Z
UID:96264-1696788000-1696842000@www.a3veen.nl
SUMMARY:De meteorenzwerm Draconiden in oktober 2023
DESCRIPTION:De meteorenzwerm Draconiden bereikt op maandag 9 oktober 2023\, rond 09:00\, zijn maximum. \nZelfs wanneer de radiant in het zenit zou staan\, zou er van deze zwerm naar verwachting gemiddeld niet meer dan één meteoor per uur vallen. Rond 18:00 staat de radiant van de zwerm in het hoogste punt (op 88°) aan de hemel. Het beste moment om Draconiden waar te nemen is op 8 oktober rond 21:00. De radiant van de zwerm staat dan ongeveer 63° boven de westnoordwestelijke horizon. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 9–15 meteoren per uur zichtbaar. Op een goed donkere plek zijn circa vier keer zoveel meteoren te zien als in dichtbevolkt gebied. De Maan komt om 01:29 op\, is voor ongeveer 30% verlicht en kan eventueel storen. Rond 07:15 gaat het schemeren en om 07:53 komt de Zon op. \nLinks:\nDe meteorenzwerm Draconiden in oktober 2023
URL:https://www.a3veen.nl/event/de-meteorenzwerm-draconiden-in-oktober-2023/
CATEGORIES:Astronomie,Meteoren
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231009T200000
DTEND;TZID=Europe/Amsterdam:20231009T213000
DTSTAMP:20260601T233658
CREATED:20230929T112459Z
LAST-MODIFIED:20230929T112708Z
UID:95778-1696881600-1696887000@www.a3veen.nl
SUMMARY:Modelling the cosmos (TV webcast)
DESCRIPTION:Join world-renowned physicist Claudia Maraston and dive into the world of Stellar Population Models. \nThese models observe the spectro-photometric and mass properties of galaxies\, and have found widespread applications in astrophysics and cosmology\, providing us with the tools to study galaxy formation and evolution both theoretically and through data interpretation. Claudia will explore how Stellar Population Models are developed\, using leading-edge techniques to predict the properties of stars and their evolution over time. You’ll discover how these models are used to study the formation and evolution of galaxies\, shedding light on the mysteries of the Universe and its origins. Whether you’re an astrophysics enthusiast or just curious\, this talk promises to be a fascinating journey through one of the most exciting fields in modern science. So\, join us as we unravel the secrets of the cosmos and explore the frontiers of our understanding of the Universe. Livestream audience: pay what you can. \nLinks:\nModelling the cosmos
URL:https://www.a3veen.nl/event/modelling-the-cosmos-tv-webcast/
LOCATION:The Royal Institution of Great Britain\, 21 Albemarle Street\, London\, Verenigd Koninkrijk
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231009T230000
DTEND;TZID=Europe/Amsterdam:20231009T235800
DTSTAMP:20260601T233658
CREATED:20231009T083131Z
LAST-MODIFIED:20231012T200715Z
UID:96323-1696892400-1696895880@www.a3veen.nl
SUMMARY:The Sky at Night : Question Time Special - (TV BBC Four)
DESCRIPTION:The Sky at Night is a monthly documentary television programme on astronomy produced by the BBC. \nThe show had the same permanent presenter\, Patrick Moore\, from its first broadcast on 24 April 1957 until 7 January 2013. The latter date was a posthumous broadcast\, which followed Moore’s death on 9 December 2012. This made it the longest-running programme with the same presenter in television history. Many early episodes are missing\, either because the tapes were wiped\, thrown out\, or because the episode was broadcast live and never recorded in the first place. \nBeginning with the 3 February 2013 edition\, the show was co-presented by Lucie Green and Chris Lintott. Since December 2013 Maggie Aderin-Pocock has been a presenter. The programme’s opening and closing theme music is “At the Castle Gate”\, from the incidental music to Pelléas et Mélisande\, written in 1905 by Jean Sibelius\, performed by the Royal Philharmonic Orchestra and conducted by Sir Thomas Beecham. \nThis episode:\nA special Question Time edition of the programme\, recorded at the University of Exeter as part of the British Science Association’s Science Festival. The panel is chaired by science journalist Dallas Campbell and made up of The Sky at Night presenters Chris Lintott\, Maggie Aderin-Pocock and Pete Lawrence\, who are joined on stage by Dr Claire Davies\, who studies star and planet formation\, and Dr Hannah Wakeford\, who specialises in the atmospheres of exoplanets. The panel answer questions covering all things astronomical from The Sky at Night’s avid viewers and from audience members. We also hear about updates from the Voyager missions to life on other planets and discover where the panel would want to send future space probes if they had the chance. \nLinks:\nThe Sky at Night
URL:https://www.a3veen.nl/event/the-sky-at-night-question-time-special-tv-bbc-four-20231009/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231014T145500
DTEND;TZID=Europe/Amsterdam:20231014T205500
DTSTAMP:20260601T233658
CREATED:20231014T142656Z
LAST-MODIFIED:20231025T094249Z
UID:96736-1697295300-1697316900@www.a3veen.nl
SUMMARY:Zonsverduistering van 14 oktober 2023
DESCRIPTION:De zonsverduistering van 14 oktober 2023 betreft een ringvormige zonsverduistering die te zien is in Noord- en Zuid-Amerika\, de Stille Oceaan en zeer beperkt in het uiterste westen van Afrika. \nHet gebied waar een ringvormige eclips kan worden waargenomen\, gaat door de landen de Verenigde Staten\, Mexico\, Guatemala\, Belize\, Honduras\, Nicaragua\, Panama\, Colombia en Brazilië. In de Benelux vindt geen zonsverduistering plaats\, doordat de Maan 0\,6° ten zuiden langs de Zon beweegt. Een zonsverduistering (of zoneclips) is een astronomisch fenomeen\, waarbij overdag het licht van de Zon de waarnemer niet bereikt\, doordat een hemellichaam (meestal de Maan) in de weg van het licht staat. Een zonsverduistering is een voor mensen op aarde direct waarneembaar astronomisch fenomeen\, waarbij het in feite niet de zon\, maar een gedeelte van de Aarde is dat verduisterd wordt. Een waarnemer ziet dat de Zon bedekt wordt door de maan en dat een donker gebied met grote snelheid (de resultante van de baansnelheid van de Maan en de draaiing van de Aarde) op hem af komt. Als dat gebied (de kernschaduw) hem bereikt heeft\, is de totale zonsverduistering begonnen. Voor astronomen biedt een totale zonsverduistering een unieke kans om de corona\, de lichtkrans om de zon te bestuderen. Deze bevat bijvoorbeeld vaak zichtbare zonnevlammen. De verduistering maakt deel uit van de Saros 124 zonsverduisteringserie. \n\nLinks:\nOverzicht van alle eclipsen door NASA \nThe HamSCI Festivals of Eclipse Ionospheric Science will occur October 14\, 2023 and April 8\, 2024 during spectacular North American solar eclipses
URL:https://www.a3veen.nl/event/zonsverduistering-van-14-oktober-2023/
CATEGORIES:Astronomie,Zon
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231020T020000
DTEND;TZID=Europe/Amsterdam:20231020T081200
DTSTAMP:20260601T233658
CREATED:20231019T123927Z
LAST-MODIFIED:20231019T123938Z
UID:97028-1697767200-1697789520@www.a3veen.nl
SUMMARY:De meteorenzwerm ε-Geminiden in oktober 2023
DESCRIPTION:De meteorenzwerm ε-Geminiden bereikt op vrijdag 20 oktober 2023\, rond 02:00\, zijn maximum. \nZelfs wanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld slechts zo’n 3 meteoren per uur vallen. Rond 06:30 staat de radiant van de zwerm in het hoogste punt (op 64°) aan de hemel. Bij ons zijn ieder uur vermoedelijk ongeveer 2 meteoren zichtbaar van deze zwerm. In totaal zijn er\, door meteoren van andere zwermen en sporadische meteoren\, bij donkere en heldere hemel circa 17–27 “vallende sterren” per uur te zien. Op een donkere locatie zijn circa twee keer zoveel meteoren zichtbaar als in een grote stad. De Maan stoort niet. Rond 07:45 gaat het schemeren en om 08:12 komt de Zon op. Over het algemeen zijn de de meteoren van een zwerm niet alleen op de dag van het maximum zichtbaar. Zo is gedurende circa 15 dagen rondom het maximum meer dan 50% van het maximale aantal meteoren (1 per uur) van de ε-Geminiden te zien. De zwerm heeft daarmee een vrij lange piek.  De snelheden van de meteoren van de ε-Geminiden zijn behoorlijk hoog: zo’n 69 km/s\, dat is circa 248.040 km/uur. \nLinks:\nDe meteorenzwerm ε-Geminiden in oktober 2023
URL:https://www.a3veen.nl/event/de-meteorenzwerm-%ce%b5-geminiden-in-oktober-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231022T010000
DTEND;TZID=Europe/Amsterdam:20231022T090000
DTSTAMP:20260601T233658
CREATED:20230824T163227Z
LAST-MODIFIED:20240912T085020Z
UID:93865-1697936400-1697965200@www.a3veen.nl
SUMMARY:Observe the Moon Night 2023
DESCRIPTION:International Observe the Moon Night is an annual public outreach event sponsored by the Lunar Reconnaissance Orbiter mission\, the Solar System Exploration Division at NASA’s Goddard Space Flight Center\, and other NASA and astronomical organizations that encourages observation\, appreciation\, and understanding of the Moon and its connection to planetary science and exploration. \nEveryone on Earth is invited to join the celebration by hosting or attending an event or participating as a lunar observer — and uniting on one day each year to look at and learn about the Moon together. First organized in 2010\, there are usually over 500 events annually in over 40 countries\, hosted by universities\, observatories\, NASA Centers\, schools\, museums\, parks\, libraries\, and amateur astronomers. Some events are offered both in person and via internet streaming video. The date is selected to enhance visibility of lunar topography. \nLinks:\nObserve the Moon Night 2023
URL:https://www.a3veen.nl/event/observe-the-moon-night-2023/
CATEGORIES:Astronomie,Maan
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231022T080000
DTEND;TZID=Europe/Amsterdam:20231022T170000
DTSTAMP:20260601T233658
CREATED:20231022T134654Z
LAST-MODIFIED:20231022T134948Z
UID:97197-1697961600-1697994000@www.a3veen.nl
SUMMARY:De meteorenzwerm Leo Minoriden in oktober 2023
DESCRIPTION:De meteorenzwerm Leo Minoriden bereikt op maandag 23 oktober 2023\, rond 02:00\, zijn maximum. \nZelfs wanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld slechts zo’n 3 meteoren per uur vallen. Rond 10:30 staat de radiant van de zwerm in het hoogste punt (op 75°) aan de hemel. Het beste moment om Leo Minoriden waar te nemen is op 23 oktober rond 06:15. De radiant van de zwerm staat dan ongeveer 46° boven de horizon\, in het oosten. In onze streken zijn dan vermoedelijk circa 0–3 meteoren per uur van deze zwerm te zien. In totaal zijn er\, door meteoren van andere zwermen en sporadische meteoren\, bij donkere en heldere hemel circa 22–33 “vallende sterren” per uur te zien. Op een goed donkere plek zijn meer dan twee keer zoveel meteoren zichtbaar als in een grote stad. \nDe Maan is voor ongeveer 60% verlicht\, maar gaat om 00:17 onder. Rond 07:45 gaat het schemeren en om 08:18 komt de Zon op. Over het algemeen zijn de de meteoren van een zwerm niet alleen op de dag van het maximum zichtbaar. Zo is gedurende circa 4 dagen rondom het maximum ruim de helft van het maximum aantal meteoren per uur van de Leo Minoriden te zien. De zwerm heeft daarmee een relatief korte piek. Probeer dus ook enkele nachten voor en na het maximum meteoren waar te nemen. Wel is iedere dag die je eerder voor het maximum\, of later na het maximum waarneemt het aantal meteoren dat zichtbaar is circa 30% kleiner. De typische snelheden van de meteoren in deze zwerm zijn met circa 62 km/s (ongeveer 222.480 km/uur) relatief hoog. \nLinks:\nDe meteorenzwerm Leo Minoriden in oktober 2023
URL:https://www.a3veen.nl/event/de-meteorenzwerm-leo-minoriden-in-oktober-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231026T163800
DTEND;TZID=Europe/Amsterdam:20231026T170000
DTSTAMP:20260601T233658
CREATED:20231026T104311Z
LAST-MODIFIED:20231026T104609Z
UID:97516-1698338280-1698339600@www.a3veen.nl
SUMMARY:Komeet 321P/SOHO in 2023 - perihelium
DESCRIPTION:De komeet 321P/SOHO bereikt het perihelium op 26 oktober 2023\, deze periodieke komeet heeft een sterk elliptische baan met een omlooptijd van circa 3.8 jaar. \nDe komeet bevindt zich tijdens het perihelium op een afstand van slechts 0\,05 AE van de Zon en op 0\,97 AE van de Aarde. De helderheid van het object bedraagt dan magnitude +6\,1. Bedenk hierbij dat het lastig is de helderheid van een komeet exact te voorspellen. Daarnaast is een komeet vaak onzichtbaar rond het moment van grootste helderheid\, doordat deze zich dan te dicht bij de Zon aan de hemel bevindt. Deze komeet is in België en Nederland niet of nauwelijks zichtbaar bij een helderheid groter dan achtste magnitude. \nLinks:\nKomeet 321P/SOHO in 2023
URL:https://www.a3veen.nl/event/komeet-321p-soho-in-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231028T200100
DTEND;TZID=Europe/Amsterdam:20231029T002900
DTSTAMP:20260601T233658
CREATED:20231028T175539Z
LAST-MODIFIED:20231028T182754Z
UID:97651-1698523260-1698539340@www.a3veen.nl
SUMMARY:Gedeeltelijke maansverduistering op 28/29 oktober 2023
DESCRIPTION:In de nacht van zaterdag 28 op zondag 29 oktober 2023 vindt een gedeeltelijke maansverduistering plaats. \nDe Maan beweegt zich dan door de schaduw van de Aarde\, zodat er op een deel van het maanoppervlak geen direct zonlicht meer valt en het lijkt alsof er een hap uit de Maan is genomen. De eclips is in zijn geheel zichtbaar vanuit Nederland en België. De verduistering heeft een grootte van slechts 0.13 in de kernschaduw. De eclips begint om 20:01 uur en staat bij het maximum\, om 22:15\, op een hoogte van circa 36° (in Utrecht). De eclips eindigt om 00:29. Deze maansverduistering is niet bijzonder indrukwekkend\, omdat de Maan de kernschaduw nauwelijks raakt\, waardoor het maanoppervlak minimaal verduisterd is (bijna overal op de zichtbare zijde van de Maan valt nog tenminste een beetje zonlicht). Tijdens het maximum is echter duidelijk een klein “hapje” uit de Maan genomen. De rest van de Maan bevindt zich op dat moment in de bijschaduw\, en op die plaatsen van het maanoppervlak valt nog tenminste een beetje zonlicht. \nLinks:\nGedeeltelijke maansverduistering op 28/29 oktober 2023
URL:https://www.a3veen.nl/event/gedeeltelijke-maansverduistering-op-28-29-oktober-2023/
CATEGORIES:Astronomie,Maan
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231105T080000
DTEND;TZID=Europe/Amsterdam:20231105T170000
DTSTAMP:20260601T233658
CREATED:20231105T132940Z
LAST-MODIFIED:20231105T132940Z
UID:98117-1699171200-1699203600@www.a3veen.nl
SUMMARY:Meteorenzwerm Oktober-Arietiden in november 2023
DESCRIPTION:De meteorenzwerm Oktober-Arietiden bereikt op zondag 5 november 2023\, rond 02:00\, zijn maximum. \nWanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 5 meteoren per uur vallen. Rond 0:30 uur staat de radiant van de zwerm in het hoogste punt (op 52°) aan de hemel. Het beste moment om Oktober-Arietiden waar te nemen is op 5 november rond 23:15. De radiant staat op dat moment zo’n 50° boven de horizon\, in het zuidzuidoosten. Doordat de omstandigheden niet ideaal zijn\, zijn er bij ons dan ieder uur naar schatting slechts ongeveer 1–4 meteoren van deze zwerm zichtbaar. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 9–16 “vallende sterren” per uur te zien. Op een goed donkere plek zijn ongeveer vier keer zoveel meteoren te zien als in dichtbevolkt gebied. De Maan komt al voor middernacht op\, is voor ongeveer 45% verlicht en kan eventueel storen. \nRond 07:00 gaat het schemeren en om 07:43 komt de Zon op. Over het algemeen zijn de de meteoren van een zwerm niet alleen op de dag van het maximum zichtbaar. Zo is gedurende circa 10 dagen rondom het maximum meer dan de helft van het maximale aantal meteoren (1 per uur) van de Oktober-Arietiden te zien. Tot 8 dagen voor en na het maximum zijn nog meteoren van deze zwerm te herkennen. Probeer dus ook enkele nachten voor en na het maximum meteoren waar te nemen. Wel is iedere dag die je eerder voor het maximum\, of later na het maximum waarneemt het aantal meteoren dat zichtbaar is circa 10% kleiner. De typische snelheden van de meteoren in deze zwerm zijn met circa 30 km/s (ongeveer 108.000 km/uur) vrij gemiddeld. Meteoren waarnemen kan zonder speciale instrumenten. Wanneer het helder is\, volstaat het blote oog. Op een donkere plek zijn meer meteoren te zien dan midden in een stad. \nLinks:
URL:https://www.a3veen.nl/event/meteorenzwerm-oktober-arietiden-in-november-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231113T230000
DTEND;TZID=Europe/Amsterdam:20231113T233000
DTSTAMP:20260601T233658
CREATED:20231113T113109Z
LAST-MODIFIED:20231113T142952Z
UID:98484-1699916400-1699918200@www.a3veen.nl
SUMMARY:The Sky at Night - The Sky at Night Meets The Infinite Monkey Cage (TV BBC Four)
DESCRIPTION:The Sky at Night is a monthly documentary television programme on astronomy produced by the BBC. \nThe show had the same permanent presenter\, Patrick Moore\, from its first broadcast on 24 April 1957 until 7 January 2013. The latter date was a posthumous broadcast\, which followed Moore’s death on 9 December 2012. This made it the longest-running programme with the same presenter in television history. Many early episodes are missing\, either because the tapes were wiped\, thrown out\, or because the episode was broadcast live and never recorded in the first place. \nBeginning with the 3 February 2013 edition\, the show was co-presented by Lucie Green and Chris Lintott. Since December 2013 Maggie Aderin-Pocock has been a presenter. The programme’s opening and closing theme music is “At the Castle Gate”\, from the incidental music to Pelléas et Mélisande\, written in 1905 by Jean Sibelius\, performed by the Royal Philharmonic Orchestra and conducted by Sir Thomas Beecham. \nThis episode:\nIn this special episode to mark the end of another season of The Sky at Night\, we team up with BBC Radio 4’s The Infinite Monkey Cage to talk all things amateur astronomy. Join Maggie\, Chris and Pete\, alongside Professor Brian Cox and comedians Robin Ince and Dara Ó Briain\, in front of a live audience at the BBC’s Radio Theatre. Together they discuss their love of stargazing and share their top tips and favourite kit for looking up at the night sky. \nOutside the Radio Theatre\, Pete hosts a Star Party. He joins fellow amateur astronomers hoping to get views of the Moon\, as well as the giant planets Saturn and Jupiter\, using binoculars\, telescopes – and the naked eye. But will the clouds part for long enough? \nWe look back at 66 years of stargazing – and cloudy skies – with The Sky at Night\, including some very familiar\, but much younger\, faces. And of course\, Sir Patrick Moore. \nPete invites Professor Leigh Fletcher from the University of Leicester to the Star Party. Leigh explains how images from amateur astronomers on Earth have been used to direct the camera onboard Nasa’s Juno mission to Jupiter. And amateurs are playing a critical role in processing the data and images sent back from this gas giant. \nAnd Dr George Dransfield meets Dr Martin Archer from Imperial College London to discover how we can get involved with space science – even when it’s cloudy. Martin is involved in a Nasa project called Harp\, which is asking citizen scientists to listen to outer space. Martin took inspiration from his previous career as a radio DJ to convert plasma waves that travel through space into sound waves. By analysing these sound waves\, we can help scientists work out the impact these plasma waves might have on us here on Earth. \nLinks:\nThe Sky at Night \nThe Infinite Monkey Cage – The Monkeys meet The Sky At Night
URL:https://www.a3veen.nl/event/the-sky-at-night-the-sky-at-night-meets-the-infinite-monkey-cage-tv-bbc-four/
CATEGORIES:Astronomie,Cultuur,TV
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231115
DTEND;VALUE=DATE:20231116
DTSTAMP:20260601T233658
CREATED:20231117T085802Z
LAST-MODIFIED:20231117T112626Z
UID:98701-1700006400-1700092799@www.a3veen.nl
SUMMARY:WASP-107b / SO2\, silicate clouds\, but no CH4 detected in a warm Neptune - publication
DESCRIPTION:WASP-107b is a super-Neptune exoplanet that orbits the star WASP-107. It lies 200 light-years away from Earth in the constellation Virgo\, its discovery was announced in 2017 by a team led by D. R. Anderson via the WASP-South. \nWASP-107b could not have formed in its current orbit. It likely migrated inward from its birth orbit beyond 1 AU due to interaction with the heavier planet WASP-107c. WASP-107b is in a retrograde orbit\, strongly misaligned with the equatorial plane of the parent star. The misalignment angle is equal to 118°+38 −19. WASP-107c follows a highly eccentric and inclined orbit with a period of 1088+15 −16 days. WASP-107b is a super-Neptune ice giant exoplanet located 200 light years away from Earth in the constellation Virgo. It is roughly the size of Jupiter but less than one-tenth of Jupiter’s mass\, making it one of the lowest density exoplanets. Its radius is 0.96±0.03 times Jupiter’s\, making its atmosphere fluffy\, and coupled with transiting a moderately bright K-type star\, makes it a target for atmospheric characterization. It is eight times nearer to its star than Mercury is to the Sun and orbits its star every 5.7 days. With a temperature of 773K / 500 °C\, its atmosphere makes it one of the hottest known exoplanets. Helium was discovered in the planet’s atmosphere in 2018\, making it the first time helium was discovered on an exoplanet. A follow-up observation with Keck in 2020 showed that the helium absorption extends beyond transit-egress. Extreme ultraviolet radiation from the host star is gradually whittling down the planet’s atmosphere\, forming a comet-like tail 7 times as long as the radius of the planet. \nA transmission spectrum of the warm Neptune exoplanet WASP-107b\, captured by the Low Resolution Spectrometer (LRS) of the Mid InfraRed Instrument (MIRI) on board JWST\, reveals evidence for water vapor\, sulfur dioxide\, and silicate (sand) clouds in the planet’s atmosphere. Credit: Michiel Min / European MIRI EXO GTO team / ESA / NASA\nWhile the James Webb Space Telescope (JWST or Webb) may spend a lot of its time observing the farthest reaches of the early universe when galaxies were only just starting to form\, it also spends plenty of its time focused on objects a lot closer to home — such as the atmospheres of exoplanets in our galactic neighborhood. A team of European astronomers\, co-led by researchers from the KU Leuven Institute of Astronomy\, used observations from the JWST to detail the atmospheric composition of the exoplanet WASP-107b. The researchers found water vapor\, sulfur dioxide and even silicate sand clouds residing within the exoplanet’s dynamic atmosphere. The study ‘SO2\, silicate clouds\, but no CH4 detected in a warm Neptune‘ may also have implications for our understanding of the chemistry of distant planets. \n \n\nLinks:\nJames Webb Space Telescope reveals sandy surprise in distant planet \nOp ‘suikerspinplaneet’ WASP-107b blijkt het ook te regenen\, alleen valt daarbij geen water\, maar zand uit de lucht \nWetenschappers van KU Leuven ontdekken zandwolken op exoplaneet WASP-107b: “Wetenschappelijke mijlpaal” \nAlien Atmosphere: Webb Detects Water Vapor\, Sulfur Dioxide and Sand Clouds in Nearby Exoplanet
URL:https://www.a3veen.nl/event/wasp-107b-so2-silicate-clouds-but-no-ch4-detected-in-a-warm-neptune-publication/
CATEGORIES:Astronomie,Exoplaneet
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231115
DTEND;VALUE=DATE:20231116
DTSTAMP:20260601T233658
CREATED:20240228T141445Z
LAST-MODIFIED:20240228T141841Z
UID:103424-1700006400-1700092799@www.a3veen.nl
SUMMARY:DoBlackHoleshaveSingularities? - publication
DESCRIPTION:Roy Kerr in a 20 page article published on ResearchGate: there is no proof that black holes contain singularities when they are generated by real physical bodies. \nRoger Penrose claimed sixty years ago that trapped surfaces inevitably lead to light rays of finite affine length (FALL’s). Penrose and Stephen Hawking then asserted that these must end in actual singularities. When they could not prove this they decreed it to be self evident. It is shown that there are counterexamples through every point in the Kerr metric. These are asymptotic to at least one eventhorizon and do not end in singularities. \nLinks:\nWhy does Roy Kerr claim that the Kerr black hole does not contain a singularity? \nKerr disputes singularities in Kerr Black Holes \nRoy Kerr’s recent paper proposes that black holes don’t have singularity. Can someone explain to me his reasoning?
URL:https://www.a3veen.nl/event/doblackholeshavesingularities-publication/
CATEGORIES:Astronomie,Zwart gat
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231116
DTEND;VALUE=DATE:20231117
DTSTAMP:20260601T233658
CREATED:20231116T111229Z
LAST-MODIFIED:20231116T111340Z
UID:98636-1700092800-1700179199@www.a3veen.nl
SUMMARY:Arecibo message (1974) 2023
DESCRIPTION:The Arecibo message is an interstellar radio message carrying basic information about humanity and Earth that was sent to globular star cluster M13 in 1974. \nIt was meant as a demonstration of human technological achievement\, rather than a real attempt to enter into a conversation with extraterrestrials. It has been noted that the low resolution of the image makes it infeasible for any extraterrestrial recipients to attach the intended meaning to most of its elements. The message was broadcast into space a single time via frequency modulated radio waves at a ceremony to mark the remodeling of the Arecibo radio telescope in Puerto Rico on 16 November 1974. The message was aimed at the current location of M13\, about 25\,000 light years from Earth\, because M13 was a large and relatively close collection of stars that was available in the sky at the time and place of the ceremony. \nLinks:\n1st intentional signal to space sent by Arecibo
URL:https://www.a3veen.nl/event/arecibo-message-1974-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231116T160000
DTEND;TZID=Europe/Amsterdam:20231116T170000
DTSTAMP:20260601T233658
CREATED:20231116T113410Z
LAST-MODIFIED:20231116T113606Z
UID:98646-1700150400-1700154000@www.a3veen.nl
SUMMARY:Meteorenzwerm ι-Aurigiden in november 2023
DESCRIPTION:De meteorenzwerm ι-Aurigiden bereikt op donderdag 16 november 2023\, rond 16:00\, zijn maximum. \nWanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 8 meteoren per uur vallen. Rond 02:00 staat de radiant van de zwerm in het hoogste punt (op 71°) aan de hemel. Bij ons zijn ieder uur vermoedelijk ongeveer 6 meteoren zichtbaar van deze zwerm. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 19–28 “vallende sterren” per uur te zien. Op een goed donkere plek zijn meer dan twee keer zoveel meteoren te zien als in dichtbevolkt gebied. De Maan stoort niet. Rond 07:30 gaat het schemeren en om 08:03 komt de Zon op. De meteoren van de meeste zwermen verschijnen niet allemaal op de dag van het maximum. Zo is gedurende circa 9 dagen rondom het maximum ruim 50% van het maximum aantal meteoren per uur (3) van de ι-Aurigiden te zien. Tot 10 dagen voor en na het maximum zijn nog meteoren van deze zwerm te herkennen. Probeer dus ook enkele nachten voor en na het maximum meteoren waar te nemen. Iedere dag verder weg van het maximum zijn er echter wel ongeveer 10% minder meteoren per uur te zien. De typische snelheden van de meteoren in deze zwerm zijn met circa 34 km/s (ongeveer 122.760 km/uur) vrij gemiddeld. Er is geen speciale apparatuur nodig om meteoren waar te kunnen nemen. \n \n \nLinks:\nMeteorenzwerm ι-Aurigiden in november 2023
URL:https://www.a3veen.nl/event/meteorenzwerm-%ce%b9-aurigiden-in-november-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231118T020000
DTEND;TZID=Europe/Amsterdam:20231118T030000
DTSTAMP:20260601T233658
CREATED:20231117T232928Z
LAST-MODIFIED:20231117T232928Z
UID:98793-1700272800-1700276400@www.a3veen.nl
SUMMARY:Meteorenzwerm Leoniden in november 2023
DESCRIPTION:De meteorenzwerm Leoniden bereikt op zaterdag 18 november 2023\, rond 02:00\, zijn maximum\, de meteoren van de Leoniden zijn snel\, en de zwerm is bekend vanwege zijn regens in 1799\, 1833\, 1866\, 1966 en 1999. \nWanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 13 meteoren per uur vallen. Rond 07:00 staat de radiant van de zwerm in het hoogste punt (op 60°) aan de hemel. Het beste moment om Leoniden waar te nemen is op 18 november rond 06:00. De radiant van de zwerm staat dan ongeveer 57° boven de horizon\, in het zuidzuidoosten. Er zijn dan bij ons ieder uur naar schatting ongeveer 5–10 meteoren van deze zwerm zichtbaar. In totaal zijn er\, door meteoren van andere zwermen en sporadische meteoren\, bij donkere en heldere hemel circa 20–30 meteoren per uur zichtbaar. Op een donkere locatie zijn bijna vier keer zoveel meteoren te zien als in dichtbevolkt gebied. De Maan stoort niet. Rond 07:30 gaat het schemeren en om 08:04 komt de Zon op. Over het algemeen zijn de de meteoren van een zwerm niet alleen op de dag van het maximum zichtbaar. Zo is gedurende circa 3\,0 dagen rondom het maximum ruim de helft van het maximale aantal meteoren (4 per uur) van de Leoniden te zien. Tot 4 dagen voor en na het maximum zijn nog meteoren van deze zwerm te herkennen. De zwerm heeft daarmee een relatief korte piek. Probeer dus ook enkele nachten voor en na het maximum meteoren waar te nemen. Wel is iedere dag die je eerder voor het maximum\, of later na het maximum waarneemt het aantal meteoren dat zichtbaar is circa 40% kleiner. De typische snelheden van de meteoren in deze zwerm zijn met circa 71 km/s (ongeveer 253.800 km/uur) relatief hoog. Er is geen speciale apparatuur nodig om meteoren waar te kunnen nemen. \nLinks:\nMeteorenzwerm Leoniden in november 2023
URL:https://www.a3veen.nl/event/meteorenzwerm-leoniden-in-november-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231120
DTEND;VALUE=DATE:20231121
DTSTAMP:20260601T233658
CREATED:20231119T193448Z
LAST-MODIFIED:20241204T142659Z
UID:98909-1700438400-1700524799@www.a3veen.nl
SUMMARY:Internationaal ruimtestation 25 jaar / International Space Station (ISS) 25 years
DESCRIPTION:Het internationaal ruimtestation (afgekort ISS naar de Engelse naam International Space Station) is een ruimtestation dat in een baan om de Aarde draait en door verschillende landen wordt gebouwd\, bemenst en bekostigd. \nOp 20 november 1998 werd de eerste module gelanceerd en sinds 2 november 2000 is het station permanent bewoond. Gedurende de eerste twee decennia van de 21e eeuw is het station continu uitgebreid. In maart 2009 bevond het ruimtestation zich op een hoogte van ongeveer 355 km. Alle reeds geplaatste modules samen hebben een massa van 262\,2 ton en een inhoud van ongeveer 574 m³. \nLinks:\nWebsite van het Amerikaanse ruimtelabaratorium \nISS op de website van NASA \nISS op de website van ESA \nISS rondleiding met Sunita Williams\n\nSpace Flight Destroys Your Red Blood Cells / Hemolysis contributes to anemia during long-duration space flight – publication\n\nThe Russia-Ukraine War Has Put Many Space Missions at Risk | Putin | World War 3 | NATO / Has Putin Doomed The International Space Station? \nInternational Space Station – afspeellijst \nStarlab Space Station
URL:https://www.a3veen.nl/event/internationaal-ruimtestation-25-jaar-international-space-station-iss-25-year/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231128
DTEND;VALUE=DATE:20231129
DTSTAMP:20260601T233658
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231128T000000
DTEND;TZID=Europe/Amsterdam:20240101T055900
DTSTAMP:20260601T233658
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
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20231201
DTEND;VALUE=DATE:20231202
DTSTAMP:20260601T233658
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
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20231208
DTEND;VALUE=DATE:20231209
DTSTAMP:20260601T233658
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
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