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BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230813T140000
DTEND;TZID=Europe/Amsterdam:20230813T150000
DTSTAMP:20260601T164726
CREATED:20230810T152852Z
LAST-MODIFIED:20230811T223151Z
UID:93185-1691935200-1691938800@www.a3veen.nl
SUMMARY:Meteorenzwerm Perseïden in augustus 2023
DESCRIPTION:De meteorenzwerm Perseïden bereikt op zondag 13 augustus 2023\, rond 14:00\, zijn maximum. \nDe meteoren van de Perseïden zijn helder en snel en hebben nalichtende sporen. Wanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 85 meteoren per uur vallen. Rond 07:30 staat de radiant van de zwerm in het hoogste punt (op 84°) aan de hemel. Het beste moment om Perseïden waar te nemen is op 13 augustus rond 03:45. De radiant van de zwerm staat dan ongeveer 59° boven de horizon\, in het oostnoordoosten. Er zijn dan bij ons ieder uur naar schatting ongeveer 38–50 meteoren van deze zwerm zichtbaar. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 48–65 “vallende sterren” per uur te zien. Op een donkere locatie zijn circa drie keer zoveel meteoren te zien als in dichtbevolkt gebied. De Maan komt om 02:25 op\, is voor ongeveer 10% verlicht en stoort niet erg. Rond 05:45 gaat het schemeren en om 06:19 komt de Zon op. \nLinks:\nDe meteorenzwerm Perseïden in augustus 2023 \nBest Meteor Shower of the Year Peaks This Weekend \nPerseids \nThe 2023 Perseid meteor shower peaks this weekend! Here’s what you need to know
URL:https://www.a3veen.nl/event/meteorenzwerm-perseiden-in-augustus-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230814T080000
DTEND;TZID=Europe/Amsterdam:20230814T170000
DTSTAMP:20260601T164726
CREATED:20230814T165855Z
LAST-MODIFIED:20230814T173236Z
UID:93445-1692000000-1692032400@www.a3veen.nl
SUMMARY:The Sky at Night - Black Holes: Searching for the Unknown (TV BBC Four)
DESCRIPTION:  \nThe 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:\n \nThere has never been a more exciting time to study one of the most mysterious phenomena in space. This month\, The Sky at Night team investigate the science of black holes and discover the incredible techniques being used to uncover their secrets\, and even help us answer bigger questions about our universe. \nChris meets with Dr Becky Smethurst at the University of Oxford to learn how a black hole forms from the death of a star. He also investigates whether black holes deserve their menacing portrayal in popular culture. He describes what would happen if we got too close to the event horizon and how black holes might actually play a role in lighting up the universe. \nMaggie explores how scientists are trying to understand more about black holes by meeting Dr Tessa Baker\, who works on LIGO. The Laser Interferometer Gravitational-Wave Observatory is one of the world’s largest physics experiments and is not your usual type of observatory; instead of looking – it listens. The next observation run has just started\, and Maggie learns what they are hoping to find. \nChris meets with Dr James Nightingale\, who has recently discovered one of the largest black holes in space using brand new computational technology and the age-old technique of gravitational lensing. They explore the relationship between black holes and galaxies\, as it is thought that within the centre of every galaxy lies a supermassive black hole. \nWe visit our in-house stargazing expert\, Pete Lawrence\, who shows us how to find a black hole in the sky\, and Saturn at its brightest and best. \nFinally\, George Dransfield visits Dr Silke Weinfurtner at her black hole laboratory\, where they are simulating features of black holes here on Earth. They use fluid systems to perform experiments to try to determine if phenomena we think occur around black holes could actually happen. \nLinks:\nThe Sky at Night
URL:https://www.a3veen.nl/event/the-sky-at-night-black-holes-searching-for-the-unknown-tv-bbc-four/
CATEGORIES:Astronomie,Cultuur,TV
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230815T180000
DTEND;TZID=Europe/Amsterdam:20230815T190000
DTSTAMP:20260601T164726
CREATED:20230810T154223Z
LAST-MODIFIED:20230810T154725Z
UID:93191-1692122400-1692126000@www.a3veen.nl
SUMMARY:Asteroid Autumn - Webinar Hosted by NASA
DESCRIPTION:In this session\, participants will explore the science and technology behind these missions\, what we hope to learn from them\, and plans for public and student engagement. \nThis fall\, a convergence of NASA science and exploration missions provide an opportunity to spark excitement about asteroids. On Sept. 24\, OSIRIS-REx will return rocks and dust collected from an asteroid. Later this fall\, Psyche will launch on a mission to explore a metal-rich asteroid. And on Nov. 1\, the Lucy mission will have its first significant asteroid encounter.\nLinks:\nAsteroid Autumn – Webinar Hosted by NASA
URL:https://www.a3veen.nl/event/asteroid-autumn-webinar-hosted-by-nasa/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230815T233400
DTEND;TZID=Europe/Amsterdam:20230816T001500
DTSTAMP:20260601T164726
CREATED:20230815T224531Z
LAST-MODIFIED:20240406T150250Z
UID:93520-1692142440-1692144900@www.a3veen.nl
SUMMARY:Focus : De oorsprong van de Melkweg  (TV NPO 2)
DESCRIPTION:Focus is een Nederlands wetenschappelijk televisieprogramma van de NTR.. \nHet programma volgde in 2023 het NTR-programma Atlas op als wetenschapsprogramma van de Nederlandse Publieke Omroep. De Melkweg is in Nederland op een paar plekjes waarneembaar. Wat weten we over het ontstaan van onze kosmische achtertuin? Sterrenkundige Scott Trager van de Rijksuniversiteit Groningen bouwde een instrument\, de WEAVE\, dat moet helpen om meer te weten te komen over de vorming van de Melkweg. Op La Palma zal Trager het voor het eerst testen. Lukt het hem al wat metingen te verrichten? \nLinks:\nFocus : De oorsprong van de Melkweg
URL:https://www.a3veen.nl/event/focus-de-oorsprong-van-de-melkweg/
CATEGORIES:Astronomie,Cultuur,TV
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230817T200000
DTEND;TZID=Europe/Amsterdam:20230817T210000
DTSTAMP:20260601T164726
CREATED:20231129T205506Z
LAST-MODIFIED:20231129T205733Z
UID:99495-1692302400-1692306000@www.a3veen.nl
SUMMARY:The ghost particle: searching for the mysterious neutrino - with James Riordan (TV RIGB webcast)
DESCRIPTION:With approximately 100 trillion neutrinos passing through us every second\, these particles hold the key to unlocking some of the Universe’s greatest mysteries. \nFrom the discovery of neutrinos and their role in illuminating the Universe through neutrino telescopes to the challenges of detecting this elusive particle\, this lecture explores the science behind the ghost particle. Additionally\, we will explore the potential of neutrinos to answer some of the biggest questions in the universe\, including the composition of dark matter and the Universe’s origin. This is a unique opportunity to gain a deeper understanding of the science behind the neutrino and its impact on our understanding of the cosmos. \nLinks:
URL:https://www.a3veen.nl/event/the-ghost-particle-searching-for-the-mysterious-neutrino-with-james-riordan-tv-rigb-webcast/
LOCATION:The Royal Institution of Great Britain\, 21 Albemarle Street\, London\, Verenigd Koninkrijk
CATEGORIES:Astronomie,Fysica,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230821T040400
DTEND;TZID=Europe/Amsterdam:20230821T170000
DTSTAMP:20260601T164726
CREATED:20230821T173358Z
LAST-MODIFIED:20230821T173436Z
UID:93721-1692590640-1692637200@www.a3veen.nl
SUMMARY:Komeet 322P/SOHO in 2023
DESCRIPTION:De komeet 322P/SOHO bereikt het perihelium op 21 augustus 2023. \nDeze periodieke komeet heeft een sterk elliptische baan\, met een omlooptijd van circa 4.0 jaar. De komeet bevindt zich tijdens het perihelium op een afstand van slechts 0\,05 AE van de Zon en op 1\,00 AE van de Aarde. De helderheid van het object bedraagt dan magnitude +5\,8. 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 322P/SOHO in 2023
URL:https://www.a3veen.nl/event/komeet-322p-soho-in-2023/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230825
DTEND;VALUE=DATE:20230826
DTSTAMP:20260601T164726
CREATED:20230907T162436Z
LAST-MODIFIED:20230912T155411Z
UID:94514-1692921600-1693007999@www.a3veen.nl
SUMMARY:Is There an Earth-like Planet in the Distant Kuiper Belt? - publication
DESCRIPTION:The study ‘Is There an Earth-like Planet in the Distant Kuiper Belt?‘ suggests that a thus far undetected Earth-like planet hovering in the Kuiper Belt region could be deviating orbits of Sedna and a handful of similar trans-Neptunian objects (TNOs)\, which are the countless icy bodies orbiting the sun at gigantic distances. \nMany TNOs have oddly inclined and egg-shaped orbits\, possibly due to being tugged at by a hidden planet\, astronomers say. Two Japanese researchers used computer simulations to analyze the effects of such an undiscovered planet on the TNOs. Those simulations\, which included evolutions of numerous real and model TNOs in the furthest reaches of an icy region\, known as the Kuiper Belt\, produced the extreme orbits observed for Sedna and other TNOs. Such a planet would be between 1.5 to three times Earth’s size and would reside somewhere between 37 billion km to 74 billion km from the sun. \nSearching for planets lurking in the frigid edges of our solar system is not a new concept. The so-called Planet Nine\, a world 10 times more massive than Earth\, is thought to be responsible for at least five strange features in the solar system including the oddly inclined orbits of a few Kuiper Belt objects. This theoretical orb has captured the attention of many\, but remains undetected. But research suggests if Planet Nine exists out there\, it could be residing somewhere between 59 billion km to 119 billion km from the sun. \nAlthough the possibility of Planet Nine gained significant traction from research groups worldwide\, the theory has also been controversial. Some astronomers argue that the highly eccentric orbits of TNOs\, for which Planet Nine’s presence was considered necessary\, could occur without the hidden planet’s presence. In 2021\, an independent study in fact claimed data used by the team behind the discovery paper first theorizing Planet Nine was biased\, and concluded that there’s a very low chance of such a planet existing. In comparison to Planet Nine\, the newly hypothesized planet — dubbed “Kuiper Belt Planet (KBP)” — would be much closer and more influential on the orbits of Kuiper Belt’s objects\, especially those beyond 7 billion km\, according to the study. \nLinks:\nCould an ‘Earth-like’ planet be hiding in our solar system’s outer reaches?
URL:https://www.a3veen.nl/event/is-there-an-earth-like-planet-in-the-distant-kuiper-belt-publication/
CATEGORIES:Astronomie,Planeet9
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230829
DTEND;VALUE=DATE:20230830
DTSTAMP:20260601T164726
CREATED:20230831T152415Z
LAST-MODIFIED:20230831T155401Z
UID:94132-1693267200-1693353599@www.a3veen.nl
SUMMARY:Discovery of Spherules of Likely Extrasolar Composition in the Pacific Ocean Site of the CNEOS 2014-01-08 (IM1) Bolide - publication
DESCRIPTION:For the first time in history\, scientists analyzed materials from a meter-size object that originated from outside the solar system. \nThe object lit up the sky over the Pacific Ocean nearly a decade ago and its bright fireball was tracked by US government satellites. The interstellar expedition team of the Galileo Project just completed the early analysis of 57 spherules from the crash site of the first recognized interstellar meteor\, IM1. Five of these millimeter-size marbles originated as molten droplets from the surface of IM1 when it was exposed to the immense heat from the fireball generated by its friction on air on January 8\, 2014. Altogether\, about 700 spherules were collected by an expedition to the Pacific Ocean on June 14–28\, 2023. Technical details and supporting information can be found in a scientific paper\, which was submitted for publication in a prestigious peer-reviewed journal. \nLinks:\nSpherule analysis finds evidence of extrasolar composition \nThe IM1 Spherules from the Pacific Ocean Have Extrasolar Composition
URL:https://www.a3veen.nl/event/discovery-of-spherules-of-likely-extrasolar-composition-in-the-pacific-ocean-site-of-the-cneos-2014-01-08-im1-bolide-publication/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230831T033500
DTEND;TZID=Europe/Amsterdam:20230831T040000
DTSTAMP:20260601T164726
CREATED:20230830T102907Z
LAST-MODIFIED:20230830T102950Z
UID:94072-1693452900-1693454400@www.a3veen.nl
SUMMARY:Volle Maan (Blauwe Maan)
DESCRIPTION:Het is Volle Maan en een Blauwe Maan\, zoals de tweede Volle Maan in een maand ook wel wordt genoemd. \nBlauwe Manen komen gemiddeld eens in de ongeveer twee jaar en acht-en-halve maand voor. Een Blauwe Maan heeft geen bijzondere astronomische betekenis\, maar wordt ‘veroorzaakt’ door de definitie van onze kalender. Een tweede Volle Maan in een maand kan alleen op de 30e of 31e dag van de maand plaatsvinden. Zouden wij januari 30 dagen geven\, februari 31\, enzovoorts (met december 30 of 31 dagen)\, dan zouden sommige ‘normale’ Volle Manen Blauwe Manen worden en omgekeerd. Deze eeuw vinden twee Blauwe Manen plaats in de jaren 2018\, 2037 en 2094. \nLinks:\nVolle Maan (Blauwe Maan)
URL:https://www.a3veen.nl/event/volle-maan-blauwe-maan-20230831/
CATEGORIES:Astronomie,Maan
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230901
DTEND;VALUE=DATE:20230903
DTSTAMP:20260601T164726
CREATED:20230901T085153Z
LAST-MODIFIED:20250902T113312Z
UID:94176-1693526400-1693699199@www.a3veen.nl
SUMMARY:Carrington Event (1859) 2023
DESCRIPTION:The Carrington Event was a powerful geomagnetic storm on 1–2 September 1859\, during solar cycle 10 (1855–1867). \nA solar coronal mass ejection (CME) hit Earth’s magnetosphere and induced the largest geomagnetic storm on record. The associated “white light flare” in the solar photosphere was observed and recorded by British astronomers Richard Carrington and Richard Hodgson. The storm created strong auroral displays and caused serious damage to telegraph systems. The now-standard unique IAU identifier for this flare is SOL1859-09-01. A solar storm of this magnitude occurring today would cause widespread electrical disruptions\, blackouts\, and damage due to extended outages of the electrical grid. The solar storm of 2012 was of similar magnitude\, but it passed Earth’s orbit without striking the planet\, missing by nine days. \nLinks:\nCarrington Event literatuur \nOur Sun Is Capable of Giant Superstorms 100x Carrington Event\, New Study  \nCarrington Event • Blackout & Konsequenzen • Sonneneruption • Planetare Geologie | Christian Köberl
URL:https://www.a3veen.nl/event/carrington-event-1859-2023/
CATEGORIES:Astronomie,Zon
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230905
DTEND;VALUE=DATE:20230906
DTSTAMP:20260601T164726
CREATED:20230908T150006Z
LAST-MODIFIED:20230912T160513Z
UID:94580-1693872000-1693958399@www.a3veen.nl
SUMMARY:Ho'oleilana: An Individual Baryon Acoustic Oscillation? - publication
DESCRIPTION:Astronomers identified a vast\, bubble-like structure known as Hoʻoleilana in the distribution of relatively nearby galaxies\, estimated at 1 billion light-years in diameter and described as the first observation of an individual Baryon Acoustic Oscillation (BAO). \nThe cosmic bubble is located around 820 million light-years from Earth and is a staggering one billion light-years wide. It sits within a web of galaxies and has been given the name “Ho’oleilana\,“ which is a term from the Hawaiian creation chant Kumulipo. Ho’oleilana describes the origin of structure and relates to the stars and the moon. Massive structures such as Ho’oleilana are predicted to arise in the universe as a result of tiny ripples in the hot\, dense and mostly uniform sea of matter which existed at the beginning of time. These density ripples\, called BAOs\, grew as the universe underwent a period of rapid inflation (called the Big Bang). \nThe ripples are also known to have given rise to major cosmic structures while influencing the distribution of galaxies. However\, this is the first identification of a single structure associated with a BAO. The bubble itself is composed of previously identified structures that themselves have been considered some of the universe’s largest arrangements of matter. This includes several superclusters\, or groups of galaxy clusters\, that each contain 10 clusters and span up to 200 million light-years. At the heart of Ho’oleilana lies the Bootes supercluster and the Bootes void\, which is a 330 million-light-year-wide space of nothingness. The bubble was found using datasets collected by Cosmicflows-4\, which were published in 2022 and marks the largest compilation of precise distances to galaxies. \nLinks:\nEcho of the Big Bang: Discovered a giant object measuring a billion light-years \nVast bubble of galaxies discovered\, given Hawaiian name \nBubble of galaxies spanning 1 billion light-years could be a fossil of the Big Bang
URL:https://www.a3veen.nl/event/hooleilana-an-individual-baryon-acoustic-oscillation-publication/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230907
DTEND;VALUE=DATE:20230908
DTSTAMP:20260601T164726
CREATED:20230907T131529Z
LAST-MODIFIED:20260517T133704Z
UID:140618-1694044800-1694131199@www.a3veen.nl
SUMMARY:Metals from spacecraft reentry in stratospheric aerosol particles - publication
DESCRIPTION:Large increases in the number of low earth orbit satellites are projected in the coming decades [L. Schulz\, K.-H. Glassmeier\, Adv. Space Res. 67\, 1002–1025 (2021)] withperhaps 50\,000 additional satellites in orbit by 2030 [GAO\, Large constellations of satellites: Mitigating environmental and other effects (2022)]. \nWhen spent rocketbodies and defunct satellites reenter the atmosphere\, they produce metal vapors that condense into aerosol particles that descend into the stratosphere. So far\, models of spacecraft reentry have focused on understanding the hazard presented by objects that survive to the surface rather than on the fate of the metals that vaporize. Here\, the research shows that metals that vaporized during spacecraft reentries can be clearly measured instratospheric sulfuric acid particles. Over 20 elements from reentry were detected and were present in ratios consistent with alloys used in spacecraft. The mass of lithium\, aluminum\, copper\, and lead from the reentry of spacecraft was found to exceed the cosmic dust influx of those metals. About 10% of stratospheric sulfuric acid particles larger than 120 nm in diameter contain aluminum and other elements from spacecraft reentry. Planned increases in the number of low earth orbit satellites within the next few decades could cause up to half of stratospheric sulfuric acid particles to contain metals from reentry. The influence of this level of metallic content on the properties of stratospheric aerosol is unknown. \nLinks:\nMetals from spacecraft reentry in stratospheric aerosol particles \nMeasurement of a lithium plume from the uncontrolled re-entry of a Falcon 9 rocket – publication
URL:https://www.a3veen.nl/event/metals-from-spacecraft-reentry-in-stratospheric-aerosol-particles-publication/
CATEGORIES:Astronomie,Bibliotheek,kennis,Klimaat
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230908T200000
DTEND;TZID=Europe/Amsterdam:20230908T213000
DTSTAMP:20260601T164726
CREATED:20231117T164423Z
LAST-MODIFIED:20231117T172400Z
UID:98764-1694203200-1694208600@www.a3veen.nl
SUMMARY:From black holes to quantum computing - with Marika Taylor
DESCRIPTION:How can black holes help us understand the workings of a quantum computer? \nBlack holes are believed to be the most efficient quantum computers naturally existing in our universe. Standard computers do not have the capabilities to quickly solve some of the problems and unanswered questions facing researchers\, but black holes may be able to provide insight into how quantum computers work and facilitate their development. In this talk\, discover how a quantum computer makes use of the quantum states of subatomic particles to both store and process information and explore the long-standing question of what happens if you fall into a black hole\, from a new quantum perspective. \nLinks:\nBlack holes and quantum computers
URL:https://www.a3veen.nl/event/from-black-holes-to-quantum-computing-with-marika-taylor/
LOCATION:The Royal Institution of Great Britain\, 21 Albemarle Street\, London\, Verenigd Koninkrijk
CATEGORIES:Astronomie,Kwantuminternet
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230911T223000
DTEND;TZID=Europe/Amsterdam:20230911T230000
DTSTAMP:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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:20260601T164726
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20231026T163800
DTEND;TZID=Europe/Amsterdam:20231026T170000
DTSTAMP:20260601T164726
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
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END:VCALENDAR