The sunlight at dusk gently bathes the summit region of Maunakea in a soft gradient of colors. Above a sea of clouds, a group of telescopes can be seen, including the Subaru Telescope, the Keck I and II Telescopes, and the NASA Infrared Telescope Facility (IRTF).
The Summit of Maunakea at Dusk
Credit: Sebastian Egner/NAOJ
subarutelescope.org/en/gallery/f...
🔭 #Maunakea
Demain matin (16/04), en toute fin de nuit, profitez de la fin de la période de visibilité de la comète C/2025 R3 (PanSTARRS), visible à l'œil nu puis admirez, le lever du fin croissant de Lune, accompagné de la planète Mercure (à guetter aux jumelles, ou à l'œil nu sous des ciels de bonne qualité)!
As the Artemis II crew came close to passing behind the Moon and experiencing a planned loss of signal, they captured this image of a crescent Earth. Seen from afar, it almost looks like a circular arc – except when backlit, as in other images captured by the Artemis II crew. Earth is in a crescent phase, with sunlight coming from the right. The dark portion of Earth is experiencing nighttime. On Earth’s day side, swirling clouds are visible over muted blue in the Australia and Oceania region. Credit: NASA
Capturing the Details of the Moon and the Beauty of Earth
Another magical photography by the Artemis II mission, just released by NASA Johnson...
flic.kr/p/2s7AMTQ
#Artemis 🧪🔭
Texte : Inscrivez-vous sur la page de Pré-Lancement ! Puis logo ULULE, puis Lien en description. Image : Boîte du jeu en 3D avec en haut logo du jeu avec en fond la constellation d'Orion, et en fond de couverture une illustration d'une coupole astronomique au sommet d'une montagne, au milieu d'une forêt de sapins, dans un environnement de chaines de montagnes au-dessus d'une mer de nuages. Le ciel est une nébuleuse. Cette illustration est réutilisée pour le fond de la publication.
Oyez Oyez habitantes et habitants de la Galaxie !
Le lancement du financement participatif de mon #J2S #BoardGames #NEBULAEOriginsOfStars sur #Ulule est imminent !
Inscrivez-vous sur la page de pré-lancement !
fr.ulule.com/nebulae-orig...
Le partage est interstellairement généreux ! Merci !
Did the Artemis II mission get you excited about humanity’s quest for the stars? Follow this astronomy feed, which highlights some of Bluesky’s best posts on our fascinating universe: bsky.app/profile/emil...
The solar eclipse captured from a camera mounted on one of the Orion spacecraft’s solar array wings during the Artemis II crew’s flyby of the Moon’s far side. The science community is investigating whether the glow around the Moon is from zodiacal light -- interstellar dust that’s reflecting sunlight -- the solar corona, or a combination of the two. Unlike minutes-long eclipses as viewed from Earth, the Artemis II crew saw the Sun hide behind the Moon for nearly an hour. In this image, Venus can be spotted on the left, and Saturn on the right of the Moon. Credit: NASA
Orion and solar eclipse: new, fascinating image posted on NASA Johnson's flickr account, captured by a GoPro camera mounted on one of the Orion spacecraft’s solar array wings. Venus can be spotted on the left, and Saturn on the right of the Moon.
flic.kr/p/2s7wkRo #Artemis 🧪🔭
Avais tu déjà vu un cratère aussi étrange ? Je te le fais découvrir avec mon télescope !
Poke @astropierre.com @astrovicnet.bsky.social @eugenelouphoque.bsky.social
youtube.com/shorts/WO_qx...
📸 Retour sur les orages du 7 juillet 2019 entre l'Aveyron et l'Hérault. Une traque nocturne qui nous a menés jusqu'au lever du jour… Quels souvenirs ! ⛈️
➡️ photo.quentinrey.com/2026/04/orag...
Bonne lecture et merci par avance pour vos partages et retours !
Bonne journée ! ✨
#Photography
On peut d'ores et déjà l'annoncer: Marion Montaigne gagne le grand prix du meilleur titre de BD du monde.
En souvenir de Séverine Erhel, je partage cette série qu'elle a produite pour France Culture, et que j'avais grandement appréciée. www.radiofrance.fr/francecultur...
🗓️ Prochaine conférence mensuelle de la #SAF mercredi 20 mai 2026 à 19h au CNAM. 🔭
Et si, la Terre était ailleurs ?
par Roland Lehoucq
Astrophysicien @cea.fr, président de la #SAF
👉🏻 Infos & Inscriptions : saf-astronomie.fr/conferences/
▶️ Streaming : youtube.com/live/SwUHyqw...
Online registration for the 63th shortcourse on MATLAB and Python Recipes for Earth Science is now open at
digiconference.de/63rd-shortco...
See you online on 14–18 September 2026 👍
Une nouvelle méthode de calculs prenant en compte toutes les différentes méthodes astronomiques utilisées jusqu'ici, est arrivé à la mesure la plus précise (et robuste) de la vitesse d'expansion de l'univers autour de nous :
73.5 km/s par mégaparsec (± 0.81)
Mais il y a un problème :
(...)
1/5
#veilleESR « Les décisions budgétaires du gouvernement mettent la recherche en grave danger » c3n-cn.fr/2026/04/10/b... #CNRS #sciences
Allez on ne lâche rien #ESR mais ça fait 25 ans qu'on fait des tribunes, des déclarations, des pétitions, des manifs pour alerter sur le lent et constant déclin de la recherche française et rien ne se passe #fatigue
![Comic. [Crack of lightning making BOOOOM sound over dark background. On ground, there are two figures looking at it.] PERSON 1: Don’t worry, I’m wearing an anti-static wrist strap.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreihcg36hck3xthotujuoz2obcbjim6gtytrcb4evymmfn4vfmwmyfm)
Comic. [Crack of lightning making BOOOOM sound over dark background. On ground, there are two figures looking at it.] PERSON 1: Don’t worry, I’m wearing an anti-static wrist strap.
Lightning
xkcd.com/3231/
Dans tout juste 3 ans, l'astéroïde Apophis passera à seulement 31000km de la Terre. Ce sera l'occasion unique d'observer un astéroïde à l’œil nu puisque Apophis atteindra magnitude 3. Voici à quoi ressemblera son passage express dans le ciel du 13/04/2029 vu depuis la France #Apophis #NEA
🌿A l'occasion de la 𝗦𝗲𝗺𝗮𝗶𝗻𝗲 𝗘́𝗰𝗼𝗹𝗼𝗴𝗶𝗲 𝗘𝗻𝘃𝗶𝗿𝗼𝗻𝗻𝗲𝗺𝗲𝗻𝘁 𝗕𝗶𝗼𝗱𝗶𝘃𝗲𝗿𝘀𝗶𝘁𝗲́ 𝟮𝟬𝟮𝟲, @lgp-umr8591.bsky.social organise une journée d'échanges autour de la restauration des rivières du bassin de la Seine, mardi 2 juin.
Pour s'inscrire👉 www.inee.cnrs.fr/fr/evenement...
@cnrsecologie.bsky.social
Les tiques, qui reviennent avec le printemps, peuvent transmettre aux humains la maladie de Lyme, très grave, mais aussi d’autres affections. Pour mieux les comprendre et améliorer les traitements, les chercheurs disposent désormais d’une « tiquothèque » de 80 000 spécimens.
NASA’s Orion spacecraft is seen in the well deck of USS John P. Murtha as NASA teams begin to work on post-flight processing while transiting back to Naval Base San Diego, Saturday, April 11, 2026, in the Pacific Ocean off the coast of California. NASA’s Artemis II mission took NASA astronauts Reid Wiseman, commander; Victor Glover, pilot; Christina Koch, mission specialist; and CSA (Canadian Space Agency) astronaut Jeremy Hansen, mission specialist on a nearly 10-day journey around the Moon and back to Earth. Following a splashdown at 5:07 p.m. PDT (8:07 p.m. EDT) on April 10, NASA, U.S. Navy, and U.S. Air Force teams recovered the crewmembers and spacecraft onboard the recovery ship and transferred the Wiseman, Glover, Koch, and Hansen from the ship to Naval Air Station North Island, Calif. where they boarded a NASA aircraft to return to Houston, Texas. Photo Credit: (NASA/Joel Kowsky)
NASA’s Orion spacecraft is seen in the well deck of USS John P. Murtha as NASA teams begin to work on post-flight processing while transiting back to Naval Base San Diego, Saturday, April 11, 2026, in the Pacific Ocean off the coast of California. NASA’s Artemis II mission took NASA astronauts Reid Wiseman, commander; Victor Glover, pilot; Christina Koch, mission specialist; and CSA (Canadian Space Agency) astronaut Jeremy Hansen, mission specialist on a nearly 10-day journey around the Moon and back to Earth. Following a splashdown at 5:07 p.m. PDT (8:07 p.m. EDT) on April 10, NASA, U.S. Navy, and U.S. Air Force teams recovered the crewmembers and spacecraft onboard the recovery ship and transferred the Wiseman, Glover, Koch, and Hansen from the ship to Naval Air Station North Island, Calif. where they boarded a NASA aircraft to return to Houston, Texas. Photo Credit: (NASA/Joel Kowsky)
NASA’s Orion spacecraft is seen in the well deck of USS John P. Murtha as NASA teams begin to work on post-flight processing while transiting back to Naval Base San Diego, Saturday, April 11, 2026, in the Pacific Ocean off the coast of California. NASA’s Artemis II mission took NASA astronauts Reid Wiseman, commander; Victor Glover, pilot; Christina Koch, mission specialist; and CSA (Canadian Space Agency) astronaut Jeremy Hansen, mission specialist on a nearly 10-day journey around the Moon and back to Earth. Following a splashdown at 5:07 p.m. PDT (8:07 p.m. EDT) on April 10, NASA, U.S. Navy, and U.S. Air Force teams recovered the crewmembers and spacecraft onboard the recovery ship and transferred the Wiseman, Glover, Koch, and Hansen from the ship to Naval Air Station North Island, Calif. where they boarded a NASA aircraft to return to Houston, Texas. Photo Credit: (NASA/Joel Kowsky)
NASA’s Orion spacecraft is seen in the well deck of USS John P. Murtha as NASA teams begin to work on post-flight processing while transiting back to Naval Base San Diego, Saturday, April 11, 2026, in the Pacific Ocean off the coast of California. NASA’s Artemis II mission took NASA astronauts Reid Wiseman, commander; Victor Glover, pilot; Christina Koch, mission specialist; and CSA (Canadian Space Agency) astronaut Jeremy Hansen, mission specialist on a nearly 10-day journey around the Moon and back to Earth. Following a splashdown at 5:07 p.m. PDT (8:07 p.m. EDT) on April 10, NASA, U.S. Navy, and U.S. Air Force teams recovered the crewmembers and spacecraft onboard the recovery ship and transferred the Wiseman, Glover, Koch, and Hansen from the ship to Naval Air Station North Island, Calif. where they boarded a NASA aircraft to return to Houston, Texas. Photo Credit: (NASA/Joel Kowsky)
NASA’s Orion spacecraft is seen in the well deck of USS John P. Murtha as NASA teams begin to work on post-flight processing while transiting back to Naval Base San Diego, Saturday, April 11, 2026
Credit: NASA/Joel Kowsky
www.flickr.com/photos/nasah... #Artemis 🧪🔭
🔴 La comète C/2025 R3 est visible à l'oeil nu dans Pégase au petit matin pour quelques jours encore...
Environ à 10⁰ sur un horizon Est bien dégagé.
➕ de détails par Nicolas Biver, astrophysicien à l’Observatoire de Paris et président de la Commission des comètes de la #SAF🔭
tinyurl.com/ztf8tf9p
C’est superbe ! 🤩 Bravo à tous les deux !
The Galaxy M63 shot using the combination of images shot with two same scopes (Skywatcher Quattro 200P) but different cameras (a color ASI294MC, and monochrome Poseidon-M). 15h of integration time showing lots of small galaxies in the background.
Hello all #astrophotography aficionados! Here's M63 shot with my friend Alex who's not on BS. We used same scopes but different cams. Combining our images gives this deep field with lots of small galaxies. What do you see @kat-astro-bot.bsky.social ? Details over here: www.astrobin.com/fgk1qm/
Comet C/2025 R3 (PanSTARRS)
Ashurst Lake, near Flagstaff, AZ
Blend of two images: (1) comet and stars; (2) foreground and lake. Was hoping for some reflections in the water but it was too breezy.
Nikon D850, 35mm, ƒ/1.8, ISO 100, 2x240 seconds.
#astrophotography #comet
#M101 #Galaxy Total or 3 nights (2 nights with L-Pro filter and 1 with L-Ultimate for H-alpha layer. About 13 hours total on this target)🔭 There’s still quite a lot of hot pixel noise in the L-Ultimate master after WBPP, I’m trying to figure out the cause, but overall the result is quite satisfying.
#VeilleESR #ESR
Les décisions budgétaires du gouvernement mettent la recherche en grave danger.
Communiqué de la Coordination des responsables des instances (C3N) du CNRS.
c3n-cn.fr/2026/04/10/b...
Prise d'antenne imminente. Venez nombreux !
1min de franceinfo qui résume notre discussion hier avec l’astronaute Sophie Adenot 🤩
www.franceinfo.fr/replay-jt/fr...
Où se situe l’esprit d’un chien, d’une grenouille ou d’une IA dans notre imagination collective?
Une étude sur 2399 personnes montre qu’on peut classer les entités selon 2 axes : ressentir vs agir. Les IA, en bas, glissent doucement vers la droite et se rapprochent petit à petit... d'une divinité 😱
The world's first view of Earth taken by a spacecraft from the vicinity of the Moon. The photo was transmitted to Earth by the United States Lunar Orbiter I and received at the NASA tracking station at Robledo De Chavela near Madrid, Spain. This crescent of the Earth was photographed August 23, 1966 at 16:35 GMT when the spacecraft was on its 16th orbit and just about to pass behind the Moon. Credit: NASA.
Earthset captured through the Orion spacecraft window at 6:41 p.m. EDT, April 6, 2026, during the Artemis II crew’s flyby of the Moon. A muted blue Earth with bright white clouds sets behind the cratered lunar surface. The dark portion of Earth is experiencing nighttime. On Earth’s day side, swirling clouds are visible over the Australia and Oceania region. In the foreground, Ohm crater has terraced edges and a flat floor interrupted by central peaks—formed when the surface rebounded upward during the impact that created the crater. Image Credit: NASA.
How it started, how it's going
Left: Lunar Orbiter I, 1966
Right: Artemis II, 2026
flic.kr/p/8Grtp2
flic.kr/p/2s68RXM
#Artemis 🧪🔭
