Jul Grv
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jijugo.bsky.social
Jul Grv
@jijugo.bsky.social
64 followers 190 following 40 posts
Astronome amateur, passionné de sciences et joueur de tennis 🔭⚛️🎾
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Reposted by Jul Grv
newscientist.com
Astronomers have found a system of three supermassive black holes, all actively feeding, that appear to be combining into a single system – a rare event that will help elucidate the physics of complex mergers
Three supermassive black holes have been spotted merging into one
Astronomers have found a system of three supermassive black holes, all actively feeding, that appear to be combining into a single system – a rare event that will help elucidate the physics of complex mergers
www.newscientist.com
January 8, 2026 at 7:49 AM
Reposted by Jul Grv
magalireghezza.bsky.social
Dystopie du matin.
Se réveiller dans un cauchemar.
January 8, 2026 at 6:34 AM
Reposted by Jul Grv
apod.shinyakato.dev
🔭 IC 342: Hidden Galaxy in Camelopardalis

Image Credit & Copyright: Gaetan Maxant

apod.nasa.gov/apod/ap26010...
Similar in size to large, bright spiral galaxies in our neighborhood, IC 342 is a mere 10 million light-years distant toward the long-necked, northern constellation Camelopardalis. A sprawling island universe, IC 342 would otherwise be a prominent galaxy in our night sky, but it is hidden from clear view and only glimpsed through the veil of stars, gas and dust clouds along the plane of our own Milky Way galaxy. Even though IC 342's light is dimmed and reddened by intervening cosmic clouds, this sharp telescopic image traces the galaxy's own obscuring dust, young star clusters, and glowing star forming regions along spiral arms that wind far from the galaxy's core. IC 342 has undergone a recent burst of star formation activity and is close enough to have influenced the evolution of the local group of galaxies and the Milky Way.
January 8, 2026 at 8:00 AM
Reposted by Jul Grv
langinspace.bsky.social
Un problème médical déclaré hier impose à la Nasa d'annuler une EVA et d'envisager un retour d'urgence sur Terre pour la mission Crew 11 (qui précède celle de Sophie Adenot le mois prochain). On ne sait pas qui est l'astronaute concerné

www.reuters.com/science/nasa...
NASA considers rare early ISS crew return due to astronaut’s medical issue
NASA is considering a rare early return of its crew from the International Space Station over an unspecified medical issue involving one of the astronauts, after cancelling a planned spacewalk that ha...
www.reuters.com
January 8, 2026 at 8:46 AM
Reposted by Jul Grv
drnereide.bsky.social
🧵
On 7 January 1610, Galileo Galilei discovered three of Jupiter's four largest moons, known as Galilean moons (named Io, Europa, Ganymede and Callisto by the German astronomer Simon Marius in 1614).

Image by NASA/JPL/DLR

Public Domain

🔭 🧪 #histsci #science

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"This 'family portrait,' a composite of the Jovian system, includes the edge of Jupiter with its Great Red Spot, and Jupiter's four largest moons, known as the Galilean satellites. From top to bottom, the moons shown are Io, Europa, Ganymede and Callisto." Source: https://science.nasa.gov/photojournal/family-portrait-of-jupiters-great-red-spot-and-the-galilean-satellites/
January 7, 2026 at 10:47 PM
jijugo.bsky.social
Grâce à un petit séjour de Noël sous un ciel Bortle 4 🫶, j'ai réussi ma plus belle prise de #M31 🤩
#astrophotography #Andromeda
January 8, 2026 at 9:19 AM
Reposted by Jul Grv
explorecosmos.bsky.social
When a nuclear reactor is switched on for the first time, an intense, almost hypnotic blue glow appears in the water surrounding the reactor core. 1/

#GottaLovePhysics #Physics
#science #technology #nuclearphysics
January 8, 2026 at 7:46 AM
Reposted by Jul Grv
albert-ibars.bsky.social
Una porta i tres cercles. Cases centenàries de l'Urgell.
#Fotografia #Monochrome #ClassicMono #AlphabetChallenge #WeekZforZero
December 23, 2025 at 12:59 PM
Reposted by Jul Grv
hourlycosmos.bsky.social
Video - Mars - Cloudy Arsia Mons - ESA Mars Express - From Andrea Luck (andrealuck.bsky.social) - https://flic.kr/p/2r87qXE
Download full size video here: www.flickr.com/video_download.gne?id=54558081852 see license below Credit: ESA/DLR/FUBerlin/AndreaLuck CC BY Full size 3K image: flic.kr/p/2r8dDhF Animation created processing data from: psa.esa.int Mission: ESA Mars Express North is up Instrument: HRSC Orbit: 25823 Raw Data: HP823_0000_GR4 2024-06-15T12:32:26.070Z HP823_0000_BL4 2024-06-15T12:33:09.066Z HP830_0000_GR4 2024-06-17T13:22:23.107Z HP830_0000_BL4 2024-06-17T13:23:06.070Z Colours: HP823_0000_BL4 HP823_0000_GR4 HP823_0000_RE4 HP830_0000_BL4 HP830_0000_GR4 HP830_0000_RE4 Notes: To avoid flickering of Green and Blue filter I've used a used a script created by Simeon Schmauß (www.flickr.com/photos/semeion) to deflicker the frames (explanation: bsky.app/profile/stim3on.bsky.social/post/3lcsvbai6nc2g) Credit: ESA/DLR/FUBerlin/AndreaLuck CC BY Feel free to share, giving the appropriate credit and providing a link to the original image: creativecommons.org/licenses/by/3.0/
January 7, 2026 at 3:00 AM
Reposted by Jul Grv
bricehaziza.bsky.social
😍💥L'évolution de la supernova historique de Kepler montrée en un time lapse vertigineux par Chandra, un bijou !

Certaines parties du rémanent avancent à 2% de la vitesse de la lumière dans l'espace !
www.lesnumeriques.com/astronomie-c...
Magnifique : l'explosion d'une étoile filmée pendant 25 ans, la supernova de Kepler est un bijou
La supernova de Kepler est une des plus étudiées du ciel. Le télescope spatial Chandra vient de publier un time-lapse de son déploiement dans l'espace sur 25 ans, et avec sa vitesse de plus de 10 mill...
www.lesnumeriques.com
January 7, 2026 at 7:12 AM
Reposted by Jul Grv
revesdespace.bsky.social
🛰️🔭 Le télescope spatial Chandra de la NASA a observé sur 25 ans en rayons X la dispersion des vestiges incandescents des restes de l'explosion de la supernova de Kepler sur une période de 25 ans
January 7, 2026 at 7:19 AM
Reposted by Jul Grv
apod.shinyakato.dev
🔭 Simeis 147: The Spaghetti Nebula Supernova Remnant

Image Credit & Copyright: Saverio Ferretti

apod.nasa.gov/apod/ap26010...
A starfield surrounds a giant red nebula. The nebula has so many winding filaments that it has been dubbed the Spaghetti Nebula. Please see the explanation for more detailed information.
January 7, 2026 at 8:00 AM
Reposted by Jul Grv
astropierre.com
Le télescope spatial SPHEREx de la NASA a achevé sa première carte infrarouge du ciel entier sur 102 longueurs d'ondes, grâce à des observations entre mai & décembre 2025

L'image ci-dessous est dominée par les couleurs infrarouges émises par l'hydrogène chaud (bleu) et la poussière cosmique (rouge)
Image du ciel en infrarouge dominée par l'hydrogène chaud (bleu) et la poussière cosmique (rouge)
January 7, 2026 at 9:19 AM
Reposted by Jul Grv
astropierre.com
Lorsqu'un puissant séisme a frappé la région du Kamtchatka, le satellite SWOT a capturé des images du tsunami qui a suivi.

Résultat : les vagues sont bien plus complexes et dispersées que prévu, remettant en question l'idée que les grands tsunamis se propagent comme une seule vague stable.

1/2
January 7, 2026 at 9:29 AM
Reposted by Jul Grv
apod.shinyakato.dev
🔭 The Einstein Cross Gravitational Lens

Image Credit & License: NSF, NOIRLab, AURA, WIYN; Processing: J. Rhoads (Arizona State U.) et al.

apod.nasa.gov/apod/ap26010...
A faint galaxy near the center of the image shows four bright spots near its center. Please see the explanation for more detailed information.
January 4, 2026 at 8:00 AM
Reposted by Jul Grv
astropierre.com
Le télescope spatial Hubble et d'autres télescopes terrestres ont pu observer une série de changements dans l'atmosphère de Bételgeuse, apportant la preuve irréfutable de la présence d'une étoile compagne plongée dans l'atmosphère externe de cette supergéante rouge.

science.nasa.gov/missions/hub...
NASA Hubble Helps Detect 'Wake' of Betelgeuse’s Elusive Companion Star - NASA Science
New Hubble and ground-based observations allowed astronomers to track the influence of a recently discovered companion star around Betelgeuse.
science.nasa.gov
January 7, 2026 at 10:16 AM
Reposted by Jul Grv
minwadhwa.bsky.social
First sunset from my office @scrippsocean.bsky.social @ucsandiego.bsky.social at the start of Winter Quarter. Here’s to a year of chasing new and amazing discoveries just beyond the horizon and finding magic in everyday moments. Happy New Year!
Sunset view of a beach in La Jolla, California, with orange hues reflected in the water and a row of clouds near the horizon.
January 6, 2026 at 7:08 AM
Reposted by Jul Grv
astropierre.com
Le @cnes.fr a annoncé la sélection par la NASA de l’instrument SPSS (South Pole Seismic Station) pour la mission lunaire Artemis IV en 2028.

Il s’agit de l’instrument le plus sensible jamais construit pour mesurer les séismes sur d'autres astres (ici, la Lune).

cnes.fr/communiques/...
L’instrument français SPSS sera à bord de la mission américaine Artemis IV
Contribution française du CNES, cet instrument de sismologie a été sélectionné par la NASA pour être déployé sur le sol lunaire.
cnes.fr
January 6, 2026 at 9:42 AM
Reposted by Jul Grv
apod.shinyakato.dev
🔭 Full Moonlight

Image Credit & Copyright: Zhengjie Wu and Jeff Dai (TWAN)

apod.nasa.gov/apod/ap26010...
The Full Moon is the brightest lunar phase, and tonight you can stand in the light of the first Full Moon of 2026. In fact, the Moon's full phase occurs on January 3 at 10:03 UTC, while only about 7 hours later planet Earth reaches its 2026 perihelion, the closest point in its elliptical orbit around the Sun, at 17:16 UTC. January's Full Moon was also not far from its own perigee, or closest approach to planet Earth. For this lunation the Moon's perigee was on January 1 at 21:44 UTC. You can also spot planet Jupiter, near its brightest for 2026 and close on the sky to the Full Moon tonight. But while you're out skygazing don't forget to look for rare, bright fireballs from the Quadrantid meteor shower.
January 3, 2026 at 8:00 AM
Reposted by Jul Grv
jdesmars.bsky.social
L' @obs-paris-psl.bsky.social sous la neige ce matin (2026.01.06) #neige
Observatoire sous la neige Observatoire sous la neige
January 6, 2026 at 10:58 AM
Reposted by Jul Grv
revesdespace.bsky.social
Une liste de ses atterrisseurs en français ici et d'autres événements spatiaux en 2026
bsky.app/profile/reve...
revesdespace.bsky.social Rêves d'espace @revesdespace.bsky.social · 3d
🚀🌑 En 2026, l'année spatiale va être encore chargée entre Artemis II, Sophie Adenot dans l'ISS, des missions d'exploration, de nouveaux télescopes spatiaux et de nouveaux lanceurs.

Tour d'horizon : reves-d-espace.com/s...
January 6, 2026 at 12:02 PM
Reposted by Jul Grv
astropierre.com
Un nombre croissant de sondes spatiales construites par des entreprises privées se prépare à tenter des atterrissages robotisés sur la Lune en 2026.

Voici la liste des missions commerciales qui visent des tentatives d'alunissage en 2026 :
www.space.com/astronomy/mo...
Moon rush: These private spacecraft will attempt lunar landings in 2026
A growing fleet of privately built spacecraft is preparing to attempt robotic landings on the moon as humanity's exploration efforts expand.
www.space.com
January 6, 2026 at 10:59 AM
Reposted by Jul Grv
astrobin.com
AstroBin's Image of the Day: "NGC 346 in the SMC" by Adam Block

www.astrobin.com/lai1dv/

#astrophotography
NGC 346 in the SMC
January 6, 2026 at 12:03 PM
Reposted by Jul Grv
astrodave.bsky.social
Venus now begins its long trek into the dusk sky. SOHO’s LASCO C2 coronagraph can also follow Venus right through superior conjunction:
January 5, 2026 at 4:12 PM
Reposted by Jul Grv
astrodave.bsky.social
Venus reaches solar conjunction tomorrow at 16UT/11AM EST, 1.7 AU distant and just 25’ from the Sun. And although -4th mag. Venus is lost in the glare of the Sun for the most part, Joerg Schoppmeyer managed to nab the elusive world with his specialized rig: spaceweathergallery2.com/indiv_upload...
Venus
January 5, 2026 at 4:06 PM