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Kuuke's SterrenbeeldenSaturnus heeft er officieel 128 nieuwe manen bijDe 146 manen van Saturnus waren al een indrukwekkend aantal maar nieuw onderzoek heeft dat aantal bijna verdubbeld. Officieel zijn er 128 nieuwe manen bekend gemaakt waardoor het aantal komt op 274 manen. Daarbij verbleken de 95 manen van Jupiter, om maar helemaal niet te spreken over de ene maan die de Aarde heeft<a href="https://www.kuuke.nl/saturnus-heeft-er-officieel-128-nieuwe-manen-bij/" rel="nofollow noopener" translate="no" target="_blank">https://www.kuuke.nl/saturnus-heeft-er-officieel-128-nieuwe-manen-bij/</a><a href="https://mastodon.nl/tags/274Mane" class="mention hashtag" rel="nofollow noopener" target="_blank">#274Mane</a> <a href="https://mastodon.nl/tags/cassini" class="mention hashtag" rel="nofollow noopener" target="_blank">#cassini</a> <a href="https://mastodon.nl/tags/CFHT" class="mention hashtag" rel="nofollow noopener" target="_blank">#CFHT</a> <a href="https://mastodon.nl/tags/huygens" class="mention hashtag" rel="nofollow noopener" target="_blank">#huygens</a> <a href="https://mastodon.nl/tags/manen" class="mention hashtag" rel="nofollow noopener" target="_blank">#manen</a> <a href="https://mastodon.nl/tags/saturnus" class="mention hashtag" rel="nofollow noopener" target="_blank">#saturnus</a>

Richard BrockieOnce the sun has set on <a href="https://hachyderm.io/tags/MaunaKea" class="mention hashtag" rel="nofollow noopener" target="_blank">#MaunaKea</a> we get ”lilac hour”. Here are the Canada–France–Hawaii and Gemini North telescopes ethereal as night falls. <a href="https://hachyderm.io/tags/CFHT" class="mention hashtag" rel="nofollow noopener" target="_blank">#CFHT</a> <a href="https://hachyderm.io/tags/gemininorth" class="mention hashtag" rel="nofollow noopener" target="_blank">#gemininorth</a> <a href="https://hachyderm.io/tags/hawaii" class="mention hashtag" rel="nofollow noopener" target="_blank">#hawaii</a>

IRAP[V347 Aur, a <a href="https://astrodon.social/tags/lighthouse" class="mention hashtag" rel="nofollow noopener" target="_blank">#lighthouse</a> in the galaxy] Some stars, like V347 Aurigae, vary greatly in <a href="https://astrodon.social/tags/brightness" class="mention hashtag" rel="nofollow noopener" target="_blank">#brightness</a> over short time scales. But why? How? The answer with <a href="https://astrodon.social/tags/SPIRou" class="mention hashtag" rel="nofollow noopener" target="_blank">#SPIRou</a>, the infrared spectropolarimeter installed on the <a href="https://astrodon.social/tags/CFHT" class="mention hashtag" rel="nofollow noopener" target="_blank">#CFHT</a> : <a href="https://www.irap.omp.eu/en/2024/10/spirou-decodes-the-bursts-of-a-protostar/" rel="nofollow noopener" translate="no" target="_blank">https://www.irap.omp.eu/en/2024/10/spirou-decodes-the-bursts-of-a-protostar/</a>Around the <a href="https://astrodon.social/tags/protostar" class="mention hashtag" rel="nofollow noopener" target="_blank">#protostar</a> V347 Aurigae orbits a brown dwarf of 30 Jupiter masses. Its elliptical trajectory invites the two bodies to periodically move towards and away from each other, generating <a href="https://astrodon.social/tags/instabilities" class="mention hashtag" rel="nofollow noopener" target="_blank">#instabilities</a> in the <a href="https://astrodon.social/tags/disc" class="mention hashtag" rel="nofollow noopener" target="_blank">#disc</a> of matter that envelops and feeds the nascent binary system. The fall of <a href="https://astrodon.social/tags/matter" class="mention hashtag" rel="nofollow noopener" target="_blank">#matter</a> onto the protostar results in a temporary increase in its luminosity by a factor of 100. Periodic light bursts captured by the SPIRou instrument.

IRAP[V347 Aur, un <a href="https://astrodon.social/tags/phare" class="mention hashtag" rel="nofollow noopener" target="_blank">#phare</a> dans la <a href="https://astrodon.social/tags/galaxie" class="mention hashtag" rel="nofollow noopener" target="_blank">#galaxie</a>] Il est des <a href="https://astrodon.social/tags/%C3%A9toiles" class="mention hashtag" rel="nofollow noopener" target="_blank">#étoiles</a>, telle V347 Aurigae, dont la <a href="https://astrodon.social/tags/luminosit%C3%A9" class="mention hashtag" rel="nofollow noopener" target="_blank">#luminosité</a> varie grandement sur de courtes échelles de temps. Pourquoi ? Comment ? La réponse avec <a href="https://astrodon.social/tags/SPIRou" class="mention hashtag" rel="nofollow noopener" target="_blank">#SPIRou</a>, le spectropolarimètre infrarouge installé sur le <a href="https://astrodon.social/tags/CFHT" class="mention hashtag" rel="nofollow noopener" target="_blank">#CFHT</a> : <a href="https://www.irap.omp.eu/2024/10/spirou-decrypte-les-sursauts-dune-protoetoile/" rel="nofollow noopener" translate="no" target="_blank">https://www.irap.omp.eu/2024/10/spirou-decrypte-les-sursauts-dune-protoetoile/</a>Autour de la <a href="https://astrodon.social/tags/proto%C3%A9toile" class="mention hashtag" rel="nofollow noopener" target="_blank">#protoétoile</a> V347 Aurigae orbite une naine brune de 30 masses jupitériennes. Sa trajectoire elliptique invite les deux corps à périodiquement se rapprocher puis s'éloigner l'un de l'autre, générant ainsi des <a href="https://astrodon.social/tags/instabilit%C3%A9s" class="mention hashtag" rel="nofollow noopener" target="_blank">#instabilités</a> dans le <a href="https://astrodon.social/tags/disque" class="mention hashtag" rel="nofollow noopener" target="_blank">#disque</a> de matière qui enveloppe et alimente le système binaire naissant. La chute de <a href="https://astrodon.social/tags/mati%C3%A8re" class="mention hashtag" rel="nofollow noopener" target="_blank">#matière</a> sur la protoétoile se traduit par une augmentation temporaire de sa luminosité d'un facteur 100. Des sursauts lumineux périodiques capturés par l'instrument SPIRou.

IRAP[<a href="https://astrodon.social/tags/Exoplan%C3%A8tes" class="mention hashtag" rel="nofollow noopener" target="_blank">#Exoplanètes</a>] Elles sont au nombre de 5500 et présentent des caractéristiques variées. L'une d'elles, baptisée WASP-76 b, un <a href="https://astrodon.social/tags/Jupiter" class="mention hashtag" rel="nofollow noopener" target="_blank">#Jupiter</a> ultra-chaud observé au moyen du spectropolarimètre infrarouge <a href="https://astrodon.social/tags/SPIROU" class="mention hashtag" rel="nofollow noopener" target="_blank">#SPIROU</a> installé sur le <a href="https://astrodon.social/tags/CFHT" class="mention hashtag" rel="nofollow noopener" target="_blank">#CFHT</a>, a fait l'objet d'une étude approfondie de la part de Thea Hood, doctorante à l'IRAP.Le temps de présenter le contexte ainsi que les résultats de cette étude est à présent arrivé. Bonne chancé Thea pour ta <a href="https://astrodon.social/tags/soutenance" class="mention hashtag" rel="nofollow noopener" target="_blank">#soutenance</a> cet aprèm ! 🤞 Info+ : <a href="https://www.irap.omp.eu/event/observer-les-atmospheres-dexoplanetes-avec-linstrument-spirou-au-telescope-canada-france-hawai/" rel="nofollow noopener" translate="no" target="_blank">https://www.irap.omp.eu/event/observer-les-atmospheres-dexoplanetes-avec-linstrument-spirou-au-telescope-canada-france-hawai/</a>

Daniel PomarèdeThe Darkest Galaxy? Discovery of the Faintest Milky Way Satellite<a href="https://www.cfht.hawaii.edu/en/news/DarkGalaxy/" target="_blank" rel="nofollow noopener" translate="no">https://www.cfht.hawaii.edu/en/news/DarkGalaxy/</a>📷 Hidden in this deep sky image (left) is a truly miniscule group of stars (right), bound together by their own gravity (and maybe even dark matter!), in orbit around the Milky Way Credit: CFHT/S. Gwyn (right) / S. Smith (left). <a href="https://mastodon.social/tags/DarkGalaxy" class="mention hashtag" rel="tag">#DarkGalaxy</a> <a href="https://mastodon.social/tags/dark" class="mention hashtag" rel="tag">#dark</a> <a href="https://mastodon.social/tags/galaxy" class="mention hashtag" rel="tag">#galaxy</a> <a href="https://mastodon.social/tags/MilkyWay" class="mention hashtag" rel="tag">#MilkyWay</a> <a href="https://mastodon.social/tags/satellite" class="mention hashtag" rel="tag">#satellite</a> <a href="https://mastodon.social/tags/stars" class="mention hashtag" rel="tag">#stars</a> <a href="https://mastodon.social/tags/darkmatter" class="mention hashtag" rel="tag">#darkmatter</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="tag">#astronomy</a> <a href="https://mastodon.social/tags/astrophysics" class="mention hashtag" rel="tag">#astrophysics</a> <a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="tag">#astrodon</a> <a href="https://mastodon.social/tags/space" class="mention hashtag" rel="tag">#space</a> <a href="https://mastodon.social/tags/science" class="mention hashtag" rel="tag">#science</a> <a href="https://mastodon.social/tags/research" class="mention hashtag" rel="tag">#research</a> <a href="https://mastodon.social/tags/STEM" class="mention hashtag" rel="tag">#STEM</a> <a href="https://mastodon.social/tags/news" class="mention hashtag" rel="tag">#news</a> <a href="https://mastodon.social/tags/CFHT" class="mention hashtag" rel="tag">#CFHT</a> <a href="https://mastodon.social/tags/CFH" class="mention hashtag" rel="tag">#CFH</a> <a href="https://mastodon.social/tags/telescope" class="mention hashtag" rel="tag">#telescope</a> <a href="https://mastodon.social/tags/MaunaKea" class="mention hashtag" rel="tag">#MaunaKea</a>

Daniel PomarèdeBeautiful cover for this 1981 issue of Science featuring the Canada-France-Hawaii Telescope, to illustrate the success of scientific projects as international cooperative efforts.<a href="https://science.org/toc/science/213/4512" target="_blank" rel="nofollow noopener" translate="no">https://science.org/toc/science/213/4512</a>📷 by René Racine ✍️ feature article by Larkin Kerwin, President of the National Research Council of Canada: <a href="https://www.science.org/doi/10.1126/science.7268414" target="_blank" rel="nofollow noopener" translate="no">https://www.science.org/doi/10.1126/science.7268414</a><a href="https://mastodon.social/tags/science" class="mention hashtag" rel="tag">#science</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="tag">#astronomy</a> <a href="https://mastodon.social/tags/astrophysics" class="mention hashtag" rel="tag">#astrophysics</a> <a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="tag">#astrodon</a> <a href="https://mastodon.social/tags/telescope" class="mention hashtag" rel="tag">#telescope</a> <a href="https://mastodon.social/tags/cfht" class="mention hashtag" rel="tag">#cfht</a> <a href="https://mastodon.social/tags/canada" class="mention hashtag" rel="tag">#canada</a> <a href="https://mastodon.social/tags/france" class="mention hashtag" rel="tag">#france</a> <a href="https://mastodon.social/tags/hawaii" class="mention hashtag" rel="tag">#hawaii</a> <a href="https://mastodon.social/tags/maunakea" class="mention hashtag" rel="tag">#maunakea</a> <a href="https://mastodon.social/tags/observatory" class="mention hashtag" rel="tag">#observatory</a> <a href="https://mastodon.social/tags/maunakeaobservatory" class="mention hashtag" rel="tag">#maunakeaobservatory</a> <a href="https://mastodon.social/tags/sciencecovers" class="mention hashtag" rel="tag">#sciencecovers</a> <a href="https://mastodon.social/tags/covers" class="mention hashtag" rel="tag">#covers</a> <a href="https://mastodon.social/tags/research" class="mention hashtag" rel="tag">#research</a>

Khurram Wadee ✅The <a href="https://mastodon.org.uk/tags/Helix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Helix</a> <a href="https://mastodon.org.uk/tags/Nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#Nebula</a> from <a href="https://mastodon.org.uk/tags/CFHT" class="mention hashtag" rel="nofollow noopener" target="_blank">#CFHT</a> <a href="https://mastodon.org.uk/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a> <a href="https://mastodon.org.uk/tags/Picture" class="mention hashtag" rel="nofollow noopener" target="_blank">#Picture</a> of the Day<a href="https://apod.nasa.gov/apod/ap230507.html" rel="nofollow noopener" target="_blank">https://apod.nasa.gov/apod/ap230507.html</a><a href="https://mastodon.org.uk/tags/APOD" class="mention hashtag" rel="nofollow noopener" target="_blank">#APOD</a>

Daniel Pomarède<a href="https://mastodon.social/tags/flashbackfriday" class="mention hashtag" rel="tag">#flashbackfriday</a>Visiting the Canada-France-Hawaii Telescope on Mauna Kea, Hawai'i<a href="https://mastodon.social/tags/maunakea" class="mention hashtag" rel="tag">#maunakea</a> <a href="https://mastodon.social/tags/observatory" class="mention hashtag" rel="tag">#observatory</a> <a href="https://mastodon.social/tags/maunakeaobservatory" class="mention hashtag" rel="tag">#maunakeaobservatory</a> <a href="https://mastodon.social/tags/cfht" class="mention hashtag" rel="tag">#cfht</a> <a href="https://mastodon.social/tags/cfhtelescope" class="mention hashtag" rel="tag">#cfhtelescope</a> <a href="https://mastodon.social/tags/canada" class="mention hashtag" rel="tag">#canada</a> <a href="https://mastodon.social/tags/france" class="mention hashtag" rel="tag">#france</a> <a href="https://mastodon.social/tags/hawaii" class="mention hashtag" rel="tag">#hawaii</a> <a href="https://mastodon.social/tags/telescope" class="mention hashtag" rel="tag">#telescope</a> <a href="https://mastodon.social/tags/telescopes" class="mention hashtag" rel="tag">#telescopes</a> <a href="https://mastodon.social/tags/universe" class="mention hashtag" rel="tag">#universe</a> <a href="https://mastodon.social/tags/cosmology" class="mention hashtag" rel="tag">#cosmology</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="tag">#astronomy</a> <a href="https://mastodon.social/tags/astrophysics" class="mention hashtag" rel="tag">#astrophysics</a> <a href="https://mastodon.social/tags/astronomer" class="mention hashtag" rel="tag">#astronomer</a> <a href="https://mastodon.social/tags/astronomers" class="mention hashtag" rel="tag">#astronomers</a> <a href="https://mastodon.social/tags/astro" class="mention hashtag" rel="tag">#astro</a> <a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="tag">#astrodon</a> <a href="https://mastodon.social/tags/observatories" class="mention hashtag" rel="tag">#observatories</a> <a href="https://mastodon.social/tags/space" class="mention hashtag" rel="tag">#space</a> <a href="https://mastodon.social/tags/science" class="mention hashtag" rel="tag">#science</a> <a href="https://mastodon.social/tags/research" class="mention hashtag" rel="tag">#research</a> <a href="https://mastodon.social/tags/photography" class="mention hashtag" rel="tag">#photography</a> <a href="https://mastodon.social/tags/pacific" class="mention hashtag" rel="tag">#pacific</a> <a href="https://mastodon.social/tags/volcano" class="mention hashtag" rel="tag">#volcano</a> <a href="https://mastodon.social/tags/bigisland" class="mention hashtag" rel="tag">#bigisland</a> <a href="https://mastodon.social/tags/bigislandhawaii" class="mention hashtag" rel="tag">#bigislandhawaii</a>

Dr. Alexandre Santerne 🌍Update on the campaign to observe the <a href="https://astrodon.social/tags/transit" class="mention hashtag" rel="nofollow noopener" target="_blank">#transit</a> of <a href="https://astrodon.social/tags/HIP41378" class="mention hashtag" rel="nofollow noopener" target="_blank">#HIP41378</a> f on Nov. 12. We are one day before !!!Main observatory statuts: - <a href="https://astrodon.social/tags/Wendelstein" class="mention hashtag" rel="nofollow noopener" target="_blank">#Wendelstein</a> obs. 🟢 - <a href="https://astrodon.social/tags/SOPHIE" class="mention hashtag" rel="nofollow noopener" target="_blank">#SOPHIE</a> / <a href="https://astrodon.social/tags/HauteProvence" class="mention hashtag" rel="nofollow noopener" target="_blank">#HauteProvence</a> 🟢 - <a href="https://astrodon.social/tags/CARMENES" class="mention hashtag" rel="nofollow noopener" target="_blank">#CARMENES</a> / <a href="https://astrodon.social/tags/CalarAlto" class="mention hashtag" rel="nofollow noopener" target="_blank">#CalarAlto</a> 🟢 - <a href="https://astrodon.social/tags/MERCATOR" class="mention hashtag" rel="nofollow noopener" target="_blank">#MERCATOR</a> / <a href="https://astrodon.social/tags/LaPalma" class="mention hashtag" rel="nofollow noopener" target="_blank">#LaPalma</a> 🟢 - <a href="https://astrodon.social/tags/HARPS" class="mention hashtag" rel="nofollow noopener" target="_blank">#HARPS</a>-N / <a href="https://astrodon.social/tags/LaPalma" class="mention hashtag" rel="nofollow noopener" target="_blank">#LaPalma</a> 🟢 - <a href="https://astrodon.social/tags/ESPRESSO" class="mention hashtag" rel="nofollow noopener" target="_blank">#ESPRESSO</a> / <a href="https://astrodon.social/tags/ESO" class="mention hashtag" rel="nofollow noopener" target="_blank">#ESO</a> Paranal 🟢 - <a href="https://astrodon.social/tags/EXPRES" class="mention hashtag" rel="nofollow noopener" target="_blank">#EXPRES</a> / <a href="https://astrodon.social/tags/Lowell" class="mention hashtag" rel="nofollow noopener" target="_blank">#Lowell</a> 🟢 - <a href="https://astrodon.social/tags/NEID" class="mention hashtag" rel="nofollow noopener" target="_blank">#NEID</a> / <a href="https://astrodon.social/tags/KittPeak" class="mention hashtag" rel="nofollow noopener" target="_blank">#KittPeak</a> 🟠 - <a href="https://astrodon.social/tags/MINERVA" class="mention hashtag" rel="nofollow noopener" target="_blank">#MINERVA</a> / <a href="https://astrodon.social/tags/FWLO" class="mention hashtag" rel="nofollow noopener" target="_blank">#FWLO</a> 🟢 - <a href="https://astrodon.social/tags/HIRES" class="mention hashtag" rel="nofollow noopener" target="_blank">#HIRES</a> / <a href="https://astrodon.social/tags/MaunaKea" class="mention hashtag" rel="nofollow noopener" target="_blank">#MaunaKea</a> 🟢 - <a href="https://astrodon.social/tags/MAROON" class="mention hashtag" rel="nofollow noopener" target="_blank">#MAROON</a>-X / <a href="https://astrodon.social/tags/MaunaKea" class="mention hashtag" rel="nofollow noopener" target="_blank">#MaunaKea</a> 🔴 - <a href="https://astrodon.social/tags/SPIRou" class="mention hashtag" rel="nofollow noopener" target="_blank">#SPIRou</a> / <a href="https://astrodon.social/tags/CFHT" class="mention hashtag" rel="nofollow noopener" target="_blank">#CFHT</a> 🟢 - <a href="https://astrodon.social/tags/PARAS" class="mention hashtag" rel="nofollow noopener" target="_blank">#PARAS</a> / <a href="https://astrodon.social/tags/MountAbu" class="mention hashtag" rel="nofollow noopener" target="_blank">#MountAbu</a> 🟢 <a href="https://astrodon.social/tags/AstronomerLife" class="mention hashtag" rel="nofollow noopener" target="_blank">#AstronomerLife</a> <a href="https://astrodon.social/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a> <a href="https://astrodon.social/tags/exoplanet" class="mention hashtag" rel="nofollow noopener" target="_blank">#exoplanet</a>

Dr Robert Minchin<a href="https://mastodon.online/tags/Halloween" class="mention hashtag" rel="nofollow noopener" target="_blank">#Halloween</a> <a href="https://mastodon.online/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a>: the Ghost Nebula (IC63) viewed with <a href="https://mastodon.online/tags/SOFIA" class="mention hashtag" rel="nofollow noopener" target="_blank">#SOFIA</a>, the <a href="https://mastodon.online/tags/CFHT" class="mention hashtag" rel="nofollow noopener" target="_blank">#CFHT</a> and <a href="https://mastodon.online/tags/CARMA" class="mention hashtag" rel="nofollow noopener" target="_blank">#CARMA</a>. Image and alt text from <a href="https://www.sofia.usra.edu/publications/science-results-archive/temperature-and-density-layers-ghost-nebula" rel="nofollow noopener" target="_blank">https://www.sofia.usra.edu/publications/science-results-archive/temperature-and-density-layers-ghost-nebula</a>, describing the results of my former colleague Archana Soam (now at IIA Bangalore) in Soam et al. 2021. I'm currently working with Archana and others on some other observations (including the radio, which is where I come in) of the Ghost Nebula.

Khurram Wadee ✅The <a href="https://mastodon.org.uk/tags/Helix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Helix</a> <a href="https://mastodon.org.uk/tags/Nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#Nebula</a> from <a href="https://mastodon.org.uk/tags/CFHT" class="mention hashtag" rel="nofollow noopener" target="_blank">#CFHT</a> <a href="https://mastodon.org.uk/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a> <a href="https://mastodon.org.uk/tags/Picture" class="mention hashtag" rel="nofollow noopener" target="_blank">#Picture</a> of the Day<a href="https://apod.nasa.gov/apod/ap201124.html" rel="nofollow noopener" target="_blank">https://apod.nasa.gov/apod/ap201124.html</a><a href="https://mastodon.org.uk/tags/APOD" class="mention hashtag" rel="nofollow noopener" target="_blank">#APOD</a>

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