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BEGIN:VEVENT
DTSTART;VALUE=DATE:20221216
DTEND;VALUE=DATE:20251217
DTSTAMP:20260519T005938
CREATED:20231122T141648Z
LAST-MODIFIED:20231122T141731Z
UID:99037-1671148800-1765929599@www.a3veen.nl
SUMMARY:Surface Water and Ocean Topography (SWOT) mission
DESCRIPTION:The Surface Water and Ocean Topography (SWOT) mission is a satellite altimeter jointly developed and operated by NASA and CNES\, the French space agency\, in partnership with the Canadian Space Agency (CSA) and UK Space Agency (UKSA). \nThe objectives of the mission are to make the first global survey of the Earth’s surface water\, to observe the fine details of the ocean surface topography\, and to measure how terrestrial surface water bodies change over time. While past satellite missions like the Jason series altimeters (TOPEX/Poseidon\, Jason-1\, Jason-2\, Jason-3) have provided variation in river and lake water surface elevations at select locations\, SWOT will provide the first truly global observations of changing water levels\, stream slopes\, and inundation extents in rivers\, lakes\, and floodplains. In the world’s oceans\, SWOT will observe ocean circulation at unprecedented scales of 15–25 km (9.3–15.5 mi)\, approximately an order of magnitude finer than current satellites. Because it uses wide-swath altimetry technology\, SWOT will almost completely observe the world’s oceans and freshwater bodies with repeated high-resolution elevation measurements\, allowing observations of variations. \nLinks:\nSurface Water and Ocean Topography at NASA.gov \nOcean Surface Topography from Space at NASA.gov \nCnes project Library at CNES.fr \nAVISO+ portal for SWOT
URL:https://www.a3veen.nl/event/surface-water-and-ocean-topography-swot-mission/
CATEGORIES:Astronomie,Geografie,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230413T141500
DTEND;TZID=Europe/Amsterdam:20351213T170000
DTSTAMP:20260519T005938
CREATED:20230730T164118Z
LAST-MODIFIED:20230730T165113Z
UID:92740-1681395300-2081178000@www.a3veen.nl
SUMMARY:JUpiter ICy moons Explorer
DESCRIPTION:The JUpiter ICy moons Explorer (JUICE) is an interplanetary spacecraft in development by the European Space Agency (ESA) with Airbus Defence and Space as the main contractor. \nThe mission will study three of Jupiter‘s Galilean moons: Ganymede\, Callisto\, and Europa\, all of which are thought to have significant bodies of liquid water beneath their surfaces\, making them potentially habitable environments. The mission is not focused on volcanically active Io\, a non-icy moon. The spacecraft launched on 14 April 2023 at 12:14 UTC and will reach Jupiter in July 2031 after four gravity assists and eight years of travel. In December 2034\, the spacecraft will enter orbit around Ganymede for its close up science mission\, becoming the first spacecraft to orbit a moon other than the Moon of Earth. The selection of this mission for the L1 launch slot of ESA’s Cosmic Vision science programme was announced on 2 May 2012. Its period of operations will overlap with NASA‘s Europa Clipper mission\, launching in 2024. \n\n\nNASA’s Juno Is Getting Ever Closer to Jupiter’s Moon Io Links:\nESA’s JUICE \nJuice \nAgenda – JUpiter ICy moons Explorer : launch / Agenda – JUpiter ICy moons Explorer : launch 2nd attempt \nJuice pre-launch press briefing \nHow to follow the Juice launch live
URL:https://www.a3veen.nl/event/jupiter-icy-moons-explorer/
CATEGORIES:Astronomie,Jupiter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20230701T171100
DTEND;TZID=Europe/Amsterdam:20290701T171100
DTSTAMP:20260519T005938
CREATED:20230809T130227Z
LAST-MODIFIED:20241120T082444Z
UID:93109-1688231460-1877620260@www.a3veen.nl
SUMMARY:Cosmic Vision : Euclid space telescope / Euclides
DESCRIPTION:Euclid is a visible to near-infrared space telescope developed by the European Space Agency (ESA) and the Euclid Consortium\, the objective of the Euclid mission is to better understand dark energy and dark matter by accurately measuring the acceleration of the universe. \nTo achieve this\, the Korsch-type telescope will measure the shapes of galaxies at varying distances from Earth and investigate the relationship between distance and redshift. Dark energy is generally accepted as contributing to the increased acceleration of the expanding universe\, so understanding this relationship will help to refine how physicists and astrophysicists understand it. Euclid’s mission advances and complements ESA’s Planck telescope (2009 to 2013). The mission is named after the ancient Greek mathematician Euclid. Euclid is a medium-class (“M-class”) mission and is part of the Cosmic Vision campaign of ESA’s Science Programme. This class of missions have an ESA budget cap at around €500 million. Euclid was chosen in October 2011 together with Solar Orbiter\, out of several competing missions. Prior to the Russian invasion of Ukraine\, the launch was scheduled on a Soyuz ST-B in 2023; following the invasion\, Euclid will instead be launched on a Falcon 9 Block 5 on 1 July 2023. \nLinks:\nEuclid \nHow to follow the Euclid launch live \nRuimtetelescoop Euclid wil uitvinden waar het heelal van gemaakt is \nEuclid test images tease of riches to come \nEuclid ‘dark universe’ telescope team will unveil new full-color images today (May 23) \nZoom into the first page of ESA Euclid’s great cosmic atlas \nSpace Warps – ESA Euclid / Euclid Galaxy Zoo – help us classify the shapes of galaxies
URL:https://www.a3veen.nl/event/euclid-space-telescope-euclides/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240208T073300
DTEND;TZID=Europe/Amsterdam:20270208T170000
DTSTAMP:20260519T005938
CREATED:20240209T204257Z
LAST-MODIFIED:20240209T204747Z
UID:102637-1707377580-1802106000@www.a3veen.nl
SUMMARY:Plankton\, Aerosol\, Cloud\, ocean Ecosystem
DESCRIPTION:Plankton\, Aerosol\, Cloud\, ocean Ecosystem (PACE) is a NASA Earth-observing satellite mission that will continue and advance observations of global ocean color\, biogeochemistry\, and ecology\, as well as the carbon cycle\, aerosols and clouds. \nPACE will be used to identify the extent and duration of phytoplankton blooms and improve understanding of air quality. These and other uses of PACE data will benefit the economy and society\, especially sectors that rely on water quality\, fisheries and food security. After being proposed for cancellation under President Trump’s FY 2018 budget\, it was restored by Congress. The PACE project is managed by NASA Goddard Space Flight Center. The main instrument and bus were designed and built at Goddard Space Flight Center. On 4 February 2020\, NASA announced the selection of SpaceX to launch PACE on a Falcon 9\, at a total cost to NASA of US$80.4 million\, including the launch service and other mission-related costs. The total cost of the mission is $964 million\, which includes spacecraft construction\, launch\, and operations. PACE successfully launched on 8 February 2024 at 07:33. \nLinks:\nPACE
URL:https://www.a3veen.nl/event/plankton-aerosol-cloud-ocean-ecosystem/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20240625T232600
DTEND;TZID=Europe/Amsterdam:20391025T000000
DTSTAMP:20260519T005938
CREATED:20241025T055924Z
LAST-MODIFIED:20241025T211716Z
UID:115444-1719357960-2203113600@www.a3veen.nl
SUMMARY:GOES-19
DESCRIPTION:GOES-19 (designated GOES-U prior to reaching geostationary orbit) is a weather satellite\, the fourth and last of the GOES-R series of satellites operated by the National Oceanic and Atmospheric Administration (NOAA). \nThe GOES-R series will extend the availability of the Geostationary Operational Environmental Satellite (GOES) system until 2036. The satellite is built by Lockheed Martin\, based on the A2100 platform. The satellite was successfully launched into space atop a SpaceX Falcon Heavy rocket on 25 June 2024 at 21:26 UTC from the Kennedy Space Center in Florida\, United States. The redesign of the loop heat pipe to prevent an anomaly\, as seen in GOES-17\, is not expected to delay the launch as it did with GOES-T. GOES-U also carries a copy of the Naval Research Laboratory’s Compact CORonagraph (CCOR) instrument which\, along with the CCOR planned for Space Weather Follow On-Lagrange 1 (SWFO-L1)\, will allow continued monitoring of solar wind after the retirement of the NASA–ESA SOHO satellite in 2025. GOES-U has a dry mass of 2\,925 kg and a fueled mass of 5\,000 kg. \nLinks:\nGEOS – R\n\nGOES-U Mission Overview \nSatellite: GOES-19 \nWatch sun erupt in 1st images from NOAA’s groundbreaking new satellite (photos)
URL:https://www.a3veen.nl/event/goes-19/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20240901
DTEND;VALUE=DATE:20290902
DTSTAMP:20260519T005938
CREATED:20240403T074223Z
LAST-MODIFIED:20240403T174651Z
UID:105492-1725148800-1883001599@www.a3veen.nl
SUMMARY:Proba-3 Missie / Proba-3 Mission
DESCRIPTION:By ESA\, CC BY-SA 3.0 igo\nProba-3 zijn twee minisatellieten van de Europese Ruimtevaartorganisatie (ESA)\, ze zullen samen gelanceerd worden in een langgerekte ellipsvormige baan met een perigeum van 600 km en apogeum van 60.000 km. \nProba-3 wordt gerealiseerd door een consortium van vijftien ESA-lidstaten met als hoofdaannemer het Spaanse SENER\, het Belgische Centre Spatial uit Luik als hoofdaannemer voor de coronagraaf en het Belgische Redwire Space voor assemblage en testen. Tijdens de missie zullen twee satellieten in formatie vliegen en samen een 144 meter lange zonnecoronagraaf vormen om de corona van de zon bij de zonnerand te bestuderen. Eén ruimtevaartuig zal de optische telescoop dragen en het tweede ruimtevaartuig zal een deel van de coronagraaf dragen. Tevens worden tijdens deze missie metingen uitgevoerd voor de positionering van twee ruimtevaartuigen. \nLinks:\nProba-3 Mission
URL:https://www.a3veen.nl/event/proba-3-missie-proba-3-mission/
CATEGORIES:Astronomie,Zon
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20241007T165200
DTEND;TZID=Europe/Amsterdam:20261231T235900
DTSTAMP:20260519T005938
CREATED:20240415T075035Z
LAST-MODIFIED:20241024T161412Z
UID:106201-1728319920-1798761540@www.a3veen.nl
SUMMARY:Hera space mission
DESCRIPTION:Hera is a space mission in development at the European Space Agency in its Space Safety program\, its primary objective is to study the Didymos binary asteroid system that was impacted by DART and contribute to validation of the kinetic impact method to deviate a near-Earth asteroid in a colliding trajectory with Earth. \nIt will measure the size and the morphology of the crater created by and momentum transferred by an artificial projectile impacting an asteroid\, which will allow measuring the efficiency of the deflection produced by the impact. It will also analyze the expanding debris cloud caused by the impact. The spacecraft was launched on 7 October 2024 and will also study the results of DART impactor\, four years after NASA’s mission. DART impacted the asteroid Dimorphos\, the smaller of two objects forming the binary asteroid 65803 Didymos\, on 27 September 2022. Hera has a mass of 1128 kilograms and carries a payload of cameras\, an altimeter\, and a spectrometer. It will also carry two nano-satellite CubeSats\, called Milani and Juventas. Hera will fully characterise the composition and physical properties of the binary asteroid system including\, for the first time\, the sub-surface and internal structures. It will also perform technological demonstrations linked to operations in the vicinity of a small body and the deployment and the communication with CubeSats in interplanetary space. \nHera’s launch kit\, click picture to read\nLinks:\nESA Hera \nThermophysical Modelling of Eclipse and Occultation Events in Binary Asteroid Systems \nPlanetary defence mission Hera heading for deflected asteroid \nSpaceX rocket launches Europe’s Hera planetary defense probe to visit asteroid smacked by NASA
URL:https://www.a3veen.nl/event/hera-space-mission/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20241014T120600
DTEND;TZID=Europe/Amsterdam:20301014T235900
DTSTAMP:20260519T005938
CREATED:20240428T043612Z
LAST-MODIFIED:20241014T151635Z
UID:106946-1728907560-1918252740@www.a3veen.nl
SUMMARY:NASA’s Europa Clipper Mission
DESCRIPTION:Europa Clipper (previously known as Europa Multiple Flyby Mission) is a space probe in development by NASA. \nPlanned for launch aboard a Falcon Heavy in October 2024 (the 21-day launch window period opens on October 10\, 2024)\, the spacecraft is being developed to study the Galilean moon Europa through a series of flybys while in orbit around Jupiter\, it is the largest spacecraft NASA has ever developed for a planetary mission. This mission is a scheduled flight of the Planetary Science Division\, designated a Large Strategic Science Mission\, and funded under the Planetary Missions Program Office‘s Solar System Exploration program as its second flight. It is also supported by the new Ocean Worlds Exploration Program. Europa Clipper will perform follow-up studies to those made by the Galileo spacecraft during its eight years (1995 – 2003) in Jupiter orbit\, which indicated the existence of a subsurface ocean underneath Europa’s ice crust. Plans to send a spacecraft to Europa were initially conceived with projects such as Europa Orbiter and Jupiter Icy Moons Orbiter\, in which a spacecraft would be injected into orbit around Europa. However\, due to the adverse effects of radiation from Jupiter’s magnetosphere in Europa orbit\, it was decided that it would be safer to inject a spacecraft into an elliptical orbit around Jupiter and make 44 close flybys of the moon instead. The mission began as a joint investigation between the Jet Propulsion Laboratory (JPL) and the Applied Physics Laboratory (APL)\, and will be built with a scientific payload of nine instruments contributed by JPL\, APL\, Southwest Research Institute\, University of Texas at Austin\, Arizona State University and University of Colorado Boulder. The upcoming mission complements ESA‘s Jupiter Icy Moons Explorer launched in 2023\, which will fly-by Europa twice and Callisto multiple times before moving into orbit around Ganymede. The spacecraft will use gravity assists from Mars in February 2025 and Earth in December 2026\, before arriving at Europa in April 2030. NASA will provide live coverage of prelaunch and launch activities for Europa Clipper\, the agency’s mission to explore Jupiter’s icy moon Europa. NASA now is targeting launch no earlier than 18:06 CEST\, Monday\, Oct. 14\, on a SpaceX Falcon Heavy rocket from Launch Complex 39A at NASA’s Kennedy Space Center in Florida. \nLinks:\nNASA’s Europa Clipper Mission \nEuropa Clipper \nThe search for life on Jupiter’s moon Europa – the Europa Clipper Mission \n8 Things to Know About NASA’s Mission to an Ocean Moon of Jupiter \nNASA\, SpaceX Secure Europa Clipper Ahead of Hurricane (Milton)
URL:https://www.a3veen.nl/event/nasas-europa-clipper-mission/
CATEGORIES:Astronomie,Jupiter
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250101
DTEND;VALUE=DATE:20260101
DTSTAMP:20260519T005938
CREATED:20250101T143613Z
LAST-MODIFIED:20250517T175907Z
UID:119432-1735689600-1767225599@www.a3veen.nl
SUMMARY:#Hubble35 Hubble Telescope – 35th Anniversary Hubble’s Night Sky Challenge
DESCRIPTION:Hubble is working with The Astronomical League to coordinate the “Hubble’s Night Sky Observing Challenge” program\, providing successful observers with recognition of their achievements. \nThe challenge includes two levels and observers do not need to be an Astronomical League member to participate. Do you have a telescope? Would you like to see some of the same night sky objects from the ground that Hubble has from space? You are invited to commemorate Hubble’s 35th anniversary by accepting our year-long stargazing challenge. New challenge objects will be featured weekly. On a clear night\, find a safe location with a dark sky away from bright lights\, point your telescope skyward\, and with the help of star and finder charts\, gaze upon some of the same iconic nebulae and galaxies Hubble has observed. How many of them can you find? For amateur astronomy clubs\, science centers\, museums\, and other astronomy enthusiasts\, use these monthly lists as a guide to conduct star parties that provide an opportunity for the public to see some amazing astronomical objects in person. \nLinks:\nHubble’s Night Sky Challenge
URL:https://www.a3veen.nl/event/hubble-telescope-35th-anniversary-observing-challenge/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250110
DTEND;VALUE=DATE:20270101
DTSTAMP:20260519T005938
CREATED:20250124T135940Z
LAST-MODIFIED:20250324T142655Z
UID:122257-1736467200-1798761599@www.a3veen.nl
SUMMARY:Save the Observatory Science Centre Herstmonceux - petition
DESCRIPTION:The Observatory Science Centre is an educational charity which has called the Grade II listed\, former home of the Royal Greenwich Observatory at Herstmonceux\, East Sussex\, home for the last 30 years. \nThe Canadian landlords\, Queen’s University\, who also own Herstmonceux Castle\, are not renewing the Science Centre’s lease\, so come the end of the 2026 season the Science Centre will be homeless. Over the years the science centre have worked tirelessly to fund and restore the site and the telescopes back to their former glory. The centre is a major venue for exhibitions\, lectures and educational programmes. The renovated telescopes provide a unique setting for the general public\, schools\, colleges\, and brownie and scout groups to learn about science\, space and the world around them. Whilst the Science Centre is in search for a new site to continue operations beyond 2026\, they should not have to leave the Observatory site at all and the historic site should be preserved for future generations as a great educational tool of significant historical importance. Please sign this petition for someone to step in and prevent the Science Centre from having to leave the Observatory site. \nLinks:\nSave the Observatory Science Centre Herstmonceux \nHerstmonceux Observatory Campaign Group
URL:https://www.a3veen.nl/event/save-the-observatory-science-centre-herstmonceux-petition/
CATEGORIES:Astronomie,Cultuur
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250429
DTEND;VALUE=DATE:20300430
DTSTAMP:20260519T005938
CREATED:20250410T010724Z
LAST-MODIFIED:20250410T111116Z
UID:123054-1745884800-1903737599@www.a3veen.nl
SUMMARY:Biomass : ESA's forest mission
DESCRIPTION:Biomass is an Earth observing satellite planned for launch by the European Space Agency (ESA) on 29 April 2025 from Kourou\, French Guiana on a Vega C launch vehicle\, the mission will provide the first comprehensive measurements of global forest biomass. \nIt is meant to last for five years\, monitoring at least eight growth cycles in the world’s forests. The Biomass satellite is part of ESA’s Living Planet Programme\, which consists of Earth observation missions. Its initial launch date was set to 2020\, but that has since been delayed to 2025. The entire cost of the mission was placed at around 400 million euros. The main scientific instrument aboard Biomass will be a synthetic aperture radar (SAR) operating at 435 MHz. The satellite will measure 10 x 12 x 20m\, weigh around 1.2 tonnes and it is set to orbit the Earth at an altitude of 666 km. All devices for assembly of the satellite structure\, including vertical transport equipment\, assembly and disassembly of satellite panels\, assembly and disassembly of the Synthetic Aperture Radar are done by the Spanish company SENER. \nLinks:\nBiomass – ESA \n#ForestDay #IntlForestDay Day of Forests / Dag van het Bos 2025 (TV FAO webcast)
URL:https://www.a3veen.nl/event/biomass-esas-forest-mission/
CATEGORIES:Astronomie,Biologie,Bossen,kennis,Natuur
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250601
DTEND;VALUE=DATE:20500701
DTSTAMP:20260519T005938
CREATED:20250212T044128Z
LAST-MODIFIED:20260416T132733Z
UID:120180-1748736000-2540246399@www.a3veen.nl
SUMMARY:Vera C. Rubin Observatory
DESCRIPTION:The Vera C. Rubin Observatory\, formerly known as the Large Synoptic Survey Telescope (LSST)\, is an astronomical observatory in Chile\, its main task will be carrying out a synoptic astronomical survey\, the Legacy Survey of Space and Time. \nThe word “synoptic” is derived from the Greek words σύν (syn ’together’) and ὄψις (opsis ‘view’)\, and describes observations that give a broad view of a subject at a particular time. The observatory is located on the El Peñón peak of Cerro Pachón\, a 2\,682-meter-high mountain in Coquimbo Region\, in northern Chile\, alongside the existing Gemini South and Southern Astrophysical Research Telescopes. The LSST Base Facility is located about 100 kilometres away from the observatory by road\, in the city of La Serena. The observatory is named for Vera Rubin\, an American astronomer who pioneered discoveries about galactic rotation rates. The Rubin Observatory will house the Simonyi Survey Telescope\, a wide-field reflecting telescope with an 8.4-meter primary mirror that will photograph the entire available sky every few nights. The telescope uses a novel three-mirror design\, a variant of three-mirror anastigmat\, which allows a compact telescope to deliver sharp images over a very wide 3.5-degree-diameter field of view. Images will be recorded by a 3.2-gigapixel charge-coupled device imaging (CCD) camera\, the largest digital camera ever constructed. \nThe LSST was proposed in 2001\, and construction of the mirror began (with private funds) in 2007. LSST then became the top-ranked large ground-based project in the 2010 Astrophysics Decadal Survey\, and the project officially began construction on 1 August 2014\, when the United States National Science Foundation (NSF) authorized the FY2014 portion ($27.5 million) of its construction budget. Funding comes from the NSF\, the United States Department of Energy\, and private funding raised by the dedicated international non-profit organization\, the LSST Discovery Alliance. Operations are under the management of the Association of Universities for Research in Astronomy (AURA). The total construction cost is expected to be about $680 million. Site construction began on 14 April 2015 with the ceremonial laying of the first stone. The first on-sky observations with the engineering camera occurred on 24 October 2024\, while system first light images were released 23 June 2025. Full survey operations are planned to begin later in 2025\, due to COVID-related schedule delays. Rubin Observatory data is scheduled to become fully public after two years. \nLinks:\nVera C. Rubin Observatory \nThe Rewriting of a Pioneering Female Astronomer’s Legacy Shows How Far Trump’s DEI Purge Will Go \nFirst celestial image unveiled from revolutionary telescope \nEarly Data from NSF–DOE Vera C. Rubin Observatory Reveals Over 11\,000 New Asteroids
URL:https://www.a3veen.nl/event/vera-c-rubin-observatory-expected-opening/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20251109T204500
DTEND;TZID=Europe/Amsterdam:20280509T000000
DTSTAMP:20260519T005938
CREATED:20251109T141249Z
LAST-MODIFIED:20251113T204734Z
UID:133068-1762721100-1841443200@www.a3veen.nl
SUMMARY:ESCAPADE mission to Mars
DESCRIPTION:Escape and Plasma Acceleration and Dynamics Explorers (ESCAPADE) is a planned spacecraft mission to Mars consisting of two spacecraft known as Blue and Gold\, the mission is led by UC Berkeley’s Space Sciences Laboratory. \nOnce expected to launch in October 2024\, it is part of NASA‘s SIMPLEx program. In August 2024 the spacecraft arrived at the launch site. However\, NASA postponed the launch due to schedule and technical issues involved with the mission’s New Glenn launch vehicle\, which was set to debut with the launch of these spacecraft. Launch on the New Glenn is now planned for no earlier than November 9\, 2025. The science goals of ESCAPADE are to: \n\nunderstand the processes controlling the structure of Mars’ hybrid magnetosphere and how it guides ion flows\nunderstand how energy and momentum are transported from the solar wind through Mars’ magnetosphere\nunderstand the processes controlling the flow of energy and matter into and out of the collisional atmosphere\n\nThere are three science experiments onboard each identical spacecraft: EMAG\, EESA\, and ELP. EMAG\, which was developed by the NASA Goddard Spaceflight Center\, is a magnetometer that will measure DC magnetic fields up to 1000 nT\, mounted at the end of the boom to reduce magnetic noise from the spacecraft. EESA is an electrostatic analyzer designed to measure the energies\, fluxes\, and masses of suprathermal ions from 2 eV to 20 keV and energies and fluxes of suprathermal electrons from 3 eV to 10 keV. It is mounted on the upper deck of the spacecraft bus\, with a 240° x 120° field of view for electrons and 247.5° x 90° field of view for ions. ELP\, developed by the Space and Atmospheric Instrumentation Lab at Embry-Riddle Aeronautical University\, is a Langmuir probe consisting of three separate sensors: the multi-needle Langmuir probe (mNLP) consists of 4 thin needles mounted in two pairs ~3/4 way up the boom and measures thermal electron density; the two planar ion probes (PIPs) are mounted on the instrument deck and measure thermal ion density\, and the floating potential probe (FPP) is also mounted on the spacecraft deck and measures changes in relative spacecraft electrostatic potential. Once the nominal science orbit is achieved\, approximately six months after arriving at Mars\, Science Campaign A involves both spacecraft flying in the same orbit at varying distances from one another\, ~170 × 8\,400 km (5.66 hours) with an inclination of 65 degrees. This will last approximately six months\, at which time Blue will lower its apoapsis to 7\,000 km and Gold will raise its apoapsis to 10\,000 km. With different orbital periods (4.9 and 6.6 hours)\, the orbits will precess (due to Mars’ nonuniform gravity field) at different rates and thus separate\, allowing simultaneous measurements of distant parts of the Mars magnetosphere. This campaign will operate for approximately five months until the end of the nominal science mission less than three years after launch. Launches on November 9 and 12\, 2025\, were scrubbed due to weather conditions and solar storms; the next launch attempt is scheduled for November 13\, 2025. The launch window opens at 19:57 UTC and runs through 21:25 UTC. \nLinks:\nESCAPADE \nVoor het eerst in jaren missie naar Mars\, vuurproef voor raket Jeff Bezos
URL:https://www.a3veen.nl/event/escapade-mission-to-mars/
CATEGORIES:Astronomie,Mars
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251128
DTEND;VALUE=DATE:20251129
DTSTAMP:20260519T005938
CREATED:20251127T235052Z
LAST-MODIFIED:20251128T095324Z
UID:133985-1764288000-1764374399@www.a3veen.nl
SUMMARY:#RedPlanetDay 2025
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: A Celebration of Mars and Its Mysteries \nRed Planet Day 2025: Why November 28 Marks A Landmark Moment In Mars Exploration \n(Exo)Planeet : Mars
URL:https://www.a3veen.nl/event/redplanetday-2025/
CATEGORIES:Astronomie,Mars
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251210
DTEND;VALUE=DATE:20251211
DTSTAMP:20260519T005938
CREATED:20251210T223500Z
LAST-MODIFIED:20251228T225712Z
UID:134859-1765324800-1765411199@www.a3veen.nl
SUMMARY:The Eschatian Hypothesis - publication
DESCRIPTION:The research article titled “The Eschatian Hypothesis” explains that the first detection of an astrophysical object is usually not representative of the overall type. \nInstead\, we first tend to detect things with large observational signatures\, due to our detection methods and their biases. The history of astronomy is full of examples. The history of exoplanet detection illustrates the phenomenon. The very first exoplanets were found in the early 1990s orbiting pulsars. But now we know that those were not representative. In the NASA Exoplanet Archive of more than 6\,000 exoplanets\, fewer than 10 were found around pulsars. They were detected because pulsars are like exquisitely timed cosmic lighthouses\, and orbiting exoplanets altered that exquisite timing noticeably. It had nothing to do with how plentiful these types of planets are. For decades\, science fiction writers have tried their best to prepare us for eventual contact with aliens. Their efforts are dominated by several recurrent tropes. There’s the invasion by a warlike species\, there’s the highly evolved species trying to communicate with our primitive species\, there’s the benevolent aliens come to save us from ourselves\, and there’s the mischievous anal-probers and medical experimenters. But those examples are highly unlikely to represent first contact\, according to new thinking and research. Not just because they may be totally unrealistic\, but because of what might motivate another species to contact us\, and how that alters the observational signal they use to announce their presence. \n\nLinks:\nFirst Contact With an Alien Civilization Could Be ‘Loud’. Here’s Why
URL:https://www.a3veen.nl/event/the-eschatian-hypothesis-publication/
CATEGORIES:Astronomie,Exoplaneet
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251214
DTEND;VALUE=DATE:20251215
DTSTAMP:20260519T005938
CREATED:20250828T221949Z
LAST-MODIFIED:20250829T182503Z
UID:129882-1765670400-1765756799@www.a3veen.nl
SUMMARY:Meteorenzwerm Geminiden in december 2025
DESCRIPTION:De meteorenzwerm Geminiden bereikt op zondag 14 december 2025\, rond 05:45\, zijn maximum\, de meteoren van de Geminiden zijn gemiddeld snel\, gelig van kleur\, vaak helder en hebben korte sporen. \nWanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 120 meteoren per uur vallen. De radiant van de zwerm staat rond 02:30 in het hoogste punt aan de hemel\, op 70° boven de horizon. Bij ons zijn ieder uur vermoedelijk ongeveer 85 meteoren zichtbaar van deze zwerm. In totaal zijn er\, door meteoren van andere zwermen en sporadische meteoren\, bij donkere en heldere hemel circa 85–100 meteoren per uur zichtbaar. Op een goed donkere plek zijn bijna drie keer zoveel meteoren zichtbaar als in een grote stad. De Maan komt om 02:55 op\, is voor ongeveer 30% verlicht en kan eventueel storen. Rond 8:00 uur gaat het schemeren en om 08:41 komt de Zon op. De meteoren van de meeste zwermen verschijnen niet allemaal op de dag van het maximum\, maar de Geminiden zijn bijzonder scherp gepiekt\, en de zwerm duurt niet veel langer dan 21 uur. Een dag voor of na het maximum is nog slechts 21% van het piekaantal meteoren per uur te zien. De typische snelheden van de meteoren in deze zwerm zijn met circa 35 km/s (ongeveer 124.560 km/uur) vrij gemiddeld. \nLinks:\nMeteorenzwerm Geminiden in december 2025
URL:https://www.a3veen.nl/event/meteorenzwerm-geminiden-in-december-2025/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251223
DTEND;VALUE=DATE:20251224
DTSTAMP:20260519T005938
CREATED:20251221T234948Z
LAST-MODIFIED:20251222T195005Z
UID:134757-1766448000-1766534399@www.a3veen.nl
SUMMARY:Meteorenzwerm Ursiden in december 2025
DESCRIPTION:De meteorenzwerm Ursiden bereikt op dinsdag 23 december 2025\, rond 00:00\, zijn maximum. De meteoren van de Ursiden zijn niet erg opvallend\, wanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 12 meteoren per uur vallen. \nDe radiant van de zwerm staat rond 09:00 in het hoogste punt aan de hemel\, op 67° boven de horizon. Het beste moment om Ursiden waar te nemen is op 23 december rond 04:30. De radiant staat op dat moment zo’n 55° boven de horizon\, in het noordnoordoosten. Door de matige omstandigheden zijn er in onze streken dan vermoedelijk maar circa 2–6 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 11–19 meteoren per uur zichtbaar. Op een donkere locatie zijn ongeveer vijf keer zoveel meteoren te zien als in dichtbevolkt gebied. De Maan stoort niet. Rond 08:00 gaat het schemeren en om 08:47 komt de Zon op. Over het algemeen zijn de de meteoren van een zwerm niet alleen op de dag van het maximum zichtbaar\, maar de Ursiden zijn bijzonder scherp gepiekt\, en de zwerm duurt niet veel langer dan 16 uur. Een dag voor of na het maximum is nog slechts 14% van het piekaantal meteoren per uur te zien. De snelheden van de meteoren van de Ursiden zijn gemiddeld: zo’n 35 km/s\, dat is circa 126.000 km/uur. \nLinks:\nMeteorenzwerm Ursiden in december
URL:https://www.a3veen.nl/event/meteorenzwerm-ursiden-in-december-2025/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260101
DTEND;VALUE=DATE:20260102
DTSTAMP:20260519T005938
CREATED:20260101T192311Z
LAST-MODIFIED:20260111T135907Z
UID:135233-1767225600-1767311999@www.a3veen.nl
SUMMARY:Betelgeuse: Detection of the Expanding Wake of the Companion Star - publication
DESCRIPTION:Almost eight years of observations using the Hubble Space Telescope\, the Fred Lawrence Whipple Observatory in Arizona\, and Roque de Los Muchachos Observatory in the Canary Islands\, Spain\, provided sufficient evidence of a second star’s ‘wake’ in the guise of a high-density trail of gas in Betelgeuse’s bloated atmosphere. \nA small companion star has been confirmed\, revealed by the wake it leaves as it plows through the red giant’s atmosphere. Ignoring interference from the occasional dusty sneeze\, Betelgeuse’s light seems to vary according to two distinct cycles. One lasts about 400 days and has been linked to internal pulsations. The second\, however\, lasts around 2\,100 days\, and has been much harder to account for. The leading hypothesis suggests a small\, dim companion star on a tight orbit around the red giant\, with observations culminating in a likely detection last July. Now\, Betelgeuse’s buddy has finally been confirmed\, several months after its proposed name\, Siwarha\, was accepted. The study ‘Betelgeuse: Detection of the Expanding Wake of the Companion Star‘ has been accepted for publication in The Astrophysical Journal. \nLinks:\nBetelgeuse Is Definitely Not Alone\, 8-Year Study Confirms \nNASA Hubble Helps Detect ‘Wake’ of Betelgeuse’s Elusive Companion Star
URL:https://www.a3veen.nl/event/betelgeuse-detection-of-the-expanding-wake-of-the-companion-star-publication/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260103
DTEND;VALUE=DATE:20260104
DTSTAMP:20260519T005938
CREATED:20260103T163006Z
LAST-MODIFIED:20260103T163006Z
UID:134965-1767398400-1767484799@www.a3veen.nl
SUMMARY:Meteorenzwerm Boötiden in januari 2026
DESCRIPTION:De meteorenzwerm Boötiden bereikt op zaterdag 3 januari 2026\, rond 23:45\, zijn maximum\, de meteoren van de Boötiden hebben lange sporen en zijn zwak en blauwachtig. \nWanneer de radiant in het zenit zou staan\, zouden er van deze zwerm naar verwachting gemiddeld zo’n 130 meteoren per uur vallen. De radiant van de zwerm staat rond 09:00 in het hoogste punt aan de hemel\, op 86° boven de horizon. Het beste moment om Boötiden waar te nemen is op 4 januari rond 04:15. Dat is ongveer 4.5 uur na het moment van het maximum\, wat niet ideaal is voor een zwerm met een korte piek als deze. Hierdoor zijn zeker 55% minder meteoren te zien dan in het meest gunstige geval. De radiant staat op dat moment zo’n 45° boven de oostnoordoostelijke horizon. Doordat de omstandigheden niet ideaal zijn\, zijn er bij ons dan ieder uur naar schatting slechts ongeveer 7–14 meteoren van deze zwerm zichtbaar. Samen met meteoren van andere zwermen\, en sporadische meteoren\, zijn er bij donkere\, heldere hemel in totaal circa 8–15 meteoren per uur zichtbaar. De Maan is voor ongeveer 100% verlicht en is een flinke stoorzender; dit jaar zijn hierdoor alleen de helderste meteoren zichtbaar. Rond 08:00 gaat het schemeren en om 08:47 komt de Zon op. De Boötidenzwerm is dermate scherp gepiekt dat het zaak is zo dicht mogelijk bij het maximum waar te nemen. De meteoren van de meeste zwermen verschijnen niet allemaal op de dag van het maximum\, maar de Boötiden zijn bijzonder scherp gepiekt\, en de zwerm duurt niet veel langer dan 8 uur. Een dag voor of na het maximum is nog slechts 2% van het piekaantal meteoren per uur te zien. De snelheden van de meteoren van de Boötiden zijn gemiddeld: zo’n 41 km/s\, dat is circa 149.040 km/uur. \nLinks:\nMeteorenzwerm Boötiden in januari 2026
URL:https://www.a3veen.nl/event/meteorenzwerm-bootiden-in-januari-2026/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260104
DTEND;VALUE=DATE:20260109
DTSTAMP:20260519T005938
CREATED:20260104T215432Z
LAST-MODIFIED:20260109T220243Z
UID:135206-1767484800-1767916799@www.a3veen.nl
SUMMARY:#AAS247 247th AAS meeting
DESCRIPTION:The American Astronomical Society (AAS) is an American society of professional astronomers and other interested individuals\, headquartered in Washington\, DC. \nThe primary objective of the AAS is to promote the advancement of astronomy and closely related branches of science\, while the secondary purpose includes enhancing astronomy education and providing a political voice for its members through lobbying and grassroots activities. Its current mission is to enhance and share humanity’s scientific understanding of the universe as a diverse and inclusive astronomical community. One goal of the Society to help achieve its mission is to facilitate and strengthen the interactions among members through professional meetings and other means\, including supporting AAS Divisions and others in the field. AAS Meeting Services provides comprehensive meeting planning and support to our Divisions\, ourselves\, and others in the astronomical sciences. \nLinks:\n247th AAS meeting
URL:https://www.a3veen.nl/event/aas247-247th-aas-meeting/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20260115T200000
DTEND;TZID=Europe/Amsterdam:20260115T210000
DTSTAMP:20260519T005939
CREATED:20260115T090815Z
LAST-MODIFIED:20260117T195633Z
UID:135442-1768507200-1768510800@www.a3veen.nl
SUMMARY:Babelsberger Sternennächte – Wechselwirkungen zwischen Sternen und Planeten | Dr. Nikoleta Ilić Petković (TV webcast)
DESCRIPTION:Die Leibniz-Instituts für Astrophysik Potsdam (AIP) Babelsberger Sternennächte finden online statt\, in der Regel gibt es immer am 3. Donnerstag im Monat einen neuen Vortrag einer Wissenschaftlerin oder eines Wissenschaftlers des AIP\, der ab 20 Uhr auf dem YouTube-Kanal von Urknall\, Weltall und das Leben ausgestrahlt wird. \nIn ihrem Vortrag erklärt Dr. Nikoleta Ilić Petković\, Postdoktorandin in der Forschungsgruppe Sternphysik und Exoplaneten\, wie Sterne und ihre Planeten sich gegenseitig beeinflussen können. Dabei spielen vor allem zwei Effekte eine Rolle: die elektromagnetische Wechselwirkung und die Gezeitenwechselwirkung. Beide Effekte kennen wir von der Erde: Wenn elektrisch geladene Teilchen aus dem Sonnenwind durch das Erdmagnetfeld auf die Atmosphäre gelenkt werden\, können leuchtende Polarlichter entstehen. Dieses Phänomen wurde auch bei anderen Planeten des Sonnensystems wie dem Jupiter beobachtet und kann ebenfalls bei Exoplaneten vorkommen. Die Gezeitenkräfte von Mond und Sonne sind auf der Erde für Ebbe und Flut verantwortlich. Der umgekehrte Einfluss von Planeten auf ihren Stern ist im Sonnensystem jedoch nur sehr schwer nachweisbar. Hier kommen Exoplaneten ins Spiel: Viele dieser fernen Planeten befinden sich so nah an ihrem Mutterstern\, dass messbare Gezeiten- und elektromagnetische Wechselwirkungen auftreten können. Der Vortrag erläutert diese Wechselwirkungen und ihre möglichen Folgen für die Sterne. \n\nLinks:\nBabelsberger Sternennächte \nBabelsberger Sternennächte – playlist
URL:https://www.a3veen.nl/event/babelsberger-sternennachte-wechselwirkungen-zwischen-sternen-und-planeten-dr-nikoleta-ilic-petkovic-tv-webcast/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260116
DTEND;VALUE=DATE:20260228
DTSTAMP:20260519T005939
CREATED:20260116T190519Z
LAST-MODIFIED:20260123T193239Z
UID:135790-1768521600-1772236799@www.a3veen.nl
SUMMARY:Stertelling 2026
DESCRIPTION:✨Doe jij mee? Ga sterren tellen voor de wetenschap. \nDoor samen te tellen hoeveel sterren we kunnen zien\, meten we waar in Nederland het nog écht donker is.🌌 De opdracht is simpel: ga naar buiten\, laat je ogen even een kwartiertje aan het donker wennen en tel vervolgens de sterren binnen het sterrenbeeld Orion. Je kunt ervoor kiezen om één avond mee te meten of iedere avond gedurende de meetactie\, elke meting is de moeite waard! 🕗Tellen kan in 2026 van 16 t/m 28 januari en 15 t/m 27 februari\, iedere avond vanaf 20:00. De meetactie vindt plaats in twee periodes waarin de maan zich onder de horizon bevindt. Op die manier zie je namelijk de meeste sterren. Bij volle maan\, slecht weer of een bewolkte hemel is het erg moeilijk om sterren te tellen\, het is dus hopen op goed weer. In de handleiding leer je welke sterren je moet tellen en hoe je de meting uitvoert. Je kunt er voor kiezen om één avond mee te meten of iedere avond gedurende de meetactie\, elke meting is de moeite waard. Via het telformulier kun jij je metingen kan doorgeven\, en er is de Sterrentelkaart\, waar je je eigen en andermans metingen kunt zien. De Sterrentelkaart is mogelijk gemaakt door Geodienst\, Centrum voor Informatie Technologie\, Rijksuniversiteit Groningen. \nLinks:\nStertelling \nHelp jij mee sterren tellen? Nacht wordt steeds lichter en dat is een slecht teken
URL:https://www.a3veen.nl/event/stertelling-2026/
CATEGORIES:Astronomie,Burgerwetenschap,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20260203T212000
DTEND;TZID=Europe/Amsterdam:20260203T215100
DTSTAMP:20260519T005939
CREATED:20260203T133732Z
LAST-MODIFIED:20260204T135635Z
UID:136141-1770153600-1770155460@www.a3veen.nl
SUMMARY:Focus : Mens op de maan (TV NPO 2)
DESCRIPTION:Focus is een Nederlands wetenschappelijk televisieprogramma van de NTR. Het programma volgde in 2023 het NTR-programma Atlas op als wetenschapsprogramma van de Nederlandse Publieke Omroep. \nIn het programma gaan presentatoren Petra Grijzen en Lara Billie Rense op zoek naar oplossingen voor actuele problemen in de wereld. Focus is de crossmediale titel van het platform NTR Wetenschap. Naast het tv-programma is er de Focus-podcast die wordt gepresenteerd door Lara Billie Rense. Het platform heeft een YouTube-kanaal en is actief op Facebook\, X\, LinkedIn\, Instagram en TikTok. \nPetra Grijzen duikt in de wereld van de ruimtevaart. Voor het eerst sinds het Apollo-programma\, eind jaren 60 keert de mens terug naar de maan. Met het Artemis-programma plant NASA een menselijke maanlanding begin 2027. Waarom duurde het ruim vijf decennia voordat er weer een maanlanding wordt ondernomen en waarom willen we eigenlijk naar de maan? Maar de hoofdvraag is vooral wat er (fysiek) nodig is voor een mens om als astronaut op de maan te kunnen landen en weer veilig naar aarde terug te keren. \nLinks:\nFocus : Mens op de maan (na afloop bekijken) \nHoe het kwam dat ze 50 jaar geleden zo naar de maan gingen? Het waren heel andere types\, toen: cowboys\, geen huisvaders
URL:https://www.a3veen.nl/event/focus-mens-op-de-maan-tv-npo-2/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260206
DTEND;VALUE=DATE:20260207
DTSTAMP:20260519T005939
CREATED:20260206T122459Z
LAST-MODIFIED:20260326T124215Z
UID:138549-1770336000-1770422399@www.a3veen.nl
SUMMARY:Sequential fragmentation of C/2025 K1 (ATLAS) after its near-sun passage - publication
DESCRIPTION:Study ‘Sequential fragmentation of C/2025 K1 (ATLAS) after its near-sun passage‘: The Hubble Space Telescope caught a rare moment on camera\, getting a chance to watch a comet break up as it hurtled through space. \nBy sheer coincidence\, Hubble was able to witness comet C/2025 K1 (ATLAS) fragmenting into at least four pieces after it had passed the sun last November. Now\, a sequence of extraordinary images depicting this event is shedding light on what happens to comets as they split apart. Comet K1 reached perihelion at 0.33 au on 2025 October 8. Daily monitoring by the LCO Outbursting Objects Key Project revealed a major activity increase between November 2 and 4\, accompanied by rapid changes in coma morphology. Serendipitous HST/STIS acquisition images obtained on November 8-10 captured the comet only days after this event and resolved five fragments\, providing an early high-resolution view of a nucleus in the process of disruption. Fragment motions and morphologies indicate a hierarchical fragmentation sequence\, including a slow secondary split of fragment II. Back extrapolation shows that both the primary and secondary breakups preceded their associated photometric outbursts by roughly one to three days. This consistent lag\, together with the appearance of thin\, short-lived arclets around fragment I in the first HST epoch\, suggests that freshly exposed interior material warms rapidly but requires time before dust can be released efficiently. Given the comet’s close perihelion passage\, rotational instability driven by enhanced outgassing torques is a plausible contributor to nucleus disintegration and dust release\, and may represent the primary source of the observed brightening. These combined ground- and space-based observations provide rare\, time-resolved constraints on the thermal and structural evolution of a fragmented comet near perihelion and highlight the scientific value of capturing a nucleus within days of disruption\, when thermal adjustment\, dust mantle re-formation\, and outgassing-driven torques jointly govern the onset of activity. \nLinks:\nHubble Caught an Accidental Glimpse of a Comet Breakup\, Snapping Pictures of Bright Blue Fragments \nIcarus (https://doi.org/10.1016/j.icarus.2026.116996): Sequential fragmentation of C/2025 K1 (ATLAS) after its near-sun passage
URL:https://www.a3veen.nl/event/sequential-fragmentation-of-c-2025-k1-atlas-after-its-near-sun-passage-publication/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260212
DTEND;VALUE=DATE:20260217
DTSTAMP:20260519T005939
CREATED:20260212T090447Z
LAST-MODIFIED:20260213T090619Z
UID:136417-1770854400-1771286399@www.a3veen.nl
SUMMARY:I Heart Pluto Festival 2026
DESCRIPTION:The 2026 I Heart Pluto Festival is a four-day celebration honoring the discovery of Pluto on February 18\, 1930 and the enduring spirit of exploration that continues to define Flagstaff’s scientific community\, it is organized by Lowell Observatory. \nLinks:\nI Heart Pluto Festival
URL:https://www.a3veen.nl/event/i-heart-pluto-festival-2026/
LOCATION:Flagstaff\, Flagstaff\, United States
CATEGORIES:Astronomie,Pluto
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20260212T164500
DTEND;TZID=Europe/Amsterdam:20260212T171300
DTSTAMP:20260519T005939
CREATED:20260211T231348Z
LAST-MODIFIED:20260212T194109Z
UID:136403-1770914700-1770916380@www.a3veen.nl
SUMMARY:First Ariane 6 launch with four boosters (Ariane 64)
DESCRIPTION:The first Ariane 6 launch with four boosters (Ariane 64) was set for 12 February between 16:45–17:13 GMT (17:45–18:13 CET\, 13:45–14:13 local time)\, Europe’s most powerful rocket lifted off – now with even more power. \nThis will be the sixth flight for Ariane 6\, and the first with four boosters to propel the rocket off the launch pad at Europe’s Spaceport in French Guiana. \nLinks:\nEuropean Ariane 6 rocket lifts off with more power for the first time
URL:https://www.a3veen.nl/event/first-ariane-6-launch-with-four-boosters-ariane-64/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20260217T120000
DTEND;TZID=Europe/Amsterdam:20260217T123000
DTSTAMP:20260519T005939
CREATED:20260212T050832Z
LAST-MODIFIED:20260212T151455Z
UID:136391-1771329600-1771331400@www.a3veen.nl
SUMMARY:Zonsverduistering op 17 februari 2026
DESCRIPTION:Wereldkaart van de centrale en gedeeltelijke zonsverduistering op 17 februari 2026\nOp dinsdag 17 februari 2026 vindt een ringvormige zonsverduistering plaats\, maar in Europa is deze eclips helaas onzichtbaar. \nLinks:\nZonsverduistering op 17 februari 2026 \nCatch a ‘Ring of Fire’ Eclipse and Rare Planetary Parade This February 2026
URL:https://www.a3veen.nl/event/zonsverduistering-op-17-februari-2026/
CATEGORIES:Astronomie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260218
DTEND;VALUE=DATE:20260219
DTSTAMP:20260519T005939
CREATED:20260218T090001Z
LAST-MODIFIED:20260218T090001Z
UID:136635-1771372800-1771459199@www.a3veen.nl
SUMMARY:Pluto : ontdekking (1930) 2026
DESCRIPTION:Pluto is een dwergplaneet in de Kuipergordel\, de voorlaatste zone van het zonnestelsel\, en werd op 18 februari 1930 ontdekt door de Amerikaanse astronoom Clyde Tombaugh tijdens het vergelijken van fotografische platen met behulp van een blink comparator op het Lowell Observatory in Arizona gedurende een zoektocht naar een onbekende Planeet X in een baan buiten Neptunus\, die was voorspeld door Percival Lowell. \nDe dwergplaneet is vernoemd naar de Romeinse god van de onderwereld\, Pluto en werd tot 2006 geclassificeerd als de negende planeet. Hij heeft in de catalogus van planetoïden nummer 134340. De sterk excentrische baan van Pluto ligt grotendeels buiten die van de planeet Neptunus. Hij draait in 248 jaar om de zon en is gemiddeld bijna 40 maal zo ver ervan verwijderd als de Aarde. Pluto heeft vijf manen\, waarvan de grootste – Charon – zoveel massa heeft dat Pluto en Charon rond een gemeenschappelijk zwaartepunt draaien dat buiten het oppervlak van Pluto zelf ligt\, waardoor beide hemellichamen door sommigen als een dubbel-dwergplaneet worden gezien. \nLinks:\nAlles wat je wil weten over dwergplaneet Pluto \nPluto Fact Sheet \nI Heart Pluto Festival 2026 \nIs Pluto a planet or not? Who cares! Our love for the King of the Kuiper Belt is stronger than ever 95 years later
URL:https://www.a3veen.nl/event/pluto-ontdekking-1930-2026/
CATEGORIES:Astronomie,Pluto
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260219
DTEND;VALUE=DATE:20260220
DTSTAMP:20260519T005939
CREATED:20260219T143338Z
LAST-MODIFIED:20260517T141651Z
UID:140620-1771459200-1771545599@www.a3veen.nl
SUMMARY:Measurement of a lithium plume from the uncontrolled re-entry of a Falcon 9 rocket - publication
DESCRIPTION:A 10-fold enhancement of lithium atoms was detected at 96 km altitude by a resonance lidar at Kühlungsborn\, Germany\, approximately 20 hours after the uncontrolled re-entry of a Falcon 9 upper stage. \nThe upper-atmospheric extension of the ICOsahedral Nonhydrostatic (ICON – a unified modeling system for global numerical weather prediction and climate studies) general circulation model\, nudged to ECMWF\, was used to calculate winds. Backwards trajectories\, including wind variability as measured by radar\, traced air masses to the Falcon 9 re-entry path at 100 km altitude\, west of Ireland. The study ‘Measurement of a lithium plume from the uncontrolled re-entry of a Falcon 9 rocket‘ presents the first measurement of upper-atmospheric pollution resulting from space debris re-entry and the first observational evidence that the ablation of space debris can be detected by ground-based lidar. The analysis of geomagnetic conditions\, atmospheric dynamics\, and ionospheric measurements supports the claim that the enhancement was not of natural origin. Our findings demonstrate that identifying pollutants and tracing them to their sources is achievable\, with significant implications for monitoring and mitigating space emissions in the atmosphere. \nLinks:\nMetals from spacecraft reentry in stratospheric aerosol particles – publication
URL:https://www.a3veen.nl/event/measurement-of-a-lithium-plume-from-the-uncontrolled-re-entry-of-a-falcon-9-rocket-publication/
CATEGORIES:Astronomie,Bibliotheek,Fysica,kennis,Klimaat
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20260219T200000
DTEND;TZID=Europe/Amsterdam:20260219T210000
DTSTAMP:20260519T005939
CREATED:20260219T001331Z
LAST-MODIFIED:20260219T191403Z
UID:136707-1771531200-1771534800@www.a3veen.nl
SUMMARY:Babelsberger Sternennächte – Das zirkumgalaktische Medium: Auf der Suche nach versteckter Materie | Dr. Ramona Augustin (TV webcast)
DESCRIPTION:Die Leibniz-Instituts für Astrophysik Potsdam (AIP) Babelsberger Sternennächte finden online statt\, in der Regel gibt es immer am 3. Donnerstag im Monat einen neuen Vortrag einer Wissenschaftlerin oder eines Wissenschaftlers des AIP\, der ab 20 Uhr auf dem YouTube-Kanal von Urknall\, Weltall und das Leben ausgestrahlt wird. \nDr. Ramona Augustin\, Astrophysikerin in der Abteilung Galaxien und Quasare\, spricht zum Thema: „Auf der Suche nach versteckter Materie: Das Zirkumgalaktische Medium“. Dabei handelt es sich um das Gas\, das sich in den Halos um Galaxien befindet. Es spielt eine wichtige Rolle bei der Galaxienentwicklung\, bleibt jedoch für das bloße Auge unsichtbar. Mit Hilfe modernster spektroskopischer Methoden\, kann es dennoch gelingen\, dieses Gas aufzuspüren\, zu analysieren und damit ein Stück mehr über die Entstehung von Galaxien und ihre Weiterentwicklung zu verstehen. \nLinks:\nBabelsberger Sternennächte \nBabelsberger Sternennächte – playlist
URL:https://www.a3veen.nl/event/babelsberger-sternennachte-das-zirkumgalaktische-medium-auf-der-suche-nach-versteckter-materie-dr-ramona-augustin-tv-webcast/
CATEGORIES:Astronomie
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END:VCALENDAR