Ma dernière session d'astrophoto de samedi soir. Un amas de galaxies (Abell 2151) dans la constellation d'Hercule. Plein de jolies petites tachounettes. Mais va falloir que je me résolve à nettoyer le capteur de ma caméra, il y a un gros pâté que je n'arrive pas à éliminer complètement pendant le traitement photo... 😱
Bon faut pas trop grossir non plus, les étoiles ne sont pas très rondes, je reprendrai le traitement + tard au calme... #astrodon#astronomie#astronomy#galaxies#siril#ekos
Looking deep into space and time, two teams using the NASA/ESA/CSA James Webb Space Telescope have studied the exceptionally luminous galaxy GN-z11, which existed when our 13.8 billion-year-old Universe was only about 430 million years old.
Arp 273 is a pair of interacting galaxies, 300 million light years away in the constellation Andromeda. The larger of the spiral galaxies, known as UGC 1810, is about five times more massive than the smaller galaxy. It has a disc that is tidally distorted into a rose-like shape by the gravitational pull of the companion galaxy below it, known as UGC 1813.
First Results from DESI Make the Most Precise Measurement of Our Expanding Universe
Researchers have used the Dark Energy Spectroscopic Instrument to make the largest 3D map of our universe and world-leading measurements of dark energy, the mysterious cause of its accelerating expansion
Interesting: NGC4302's beautiful edge-on perspective gives excellent dark dust lane features, and interacts with NGC 4298.
NGC 4298 is also a lovely almost face-on spiral with some astronomers reporting it might harbour an intermediate-mass black hole estimated mass ranging from 20,000 - 500,000 Suns.
Last night I did a tutorial for my #introductory#astronomy class looking at stellar evolution and how the chemical composition of the #stars has changed over the history of the #universe. Then I wake up to hear Prof Catherine Heymans (Astronomer Royal for Scotland) talking about one of the youngest and most distant #galaxies ever found, thanks to #JWST and why it might be so bright. Here’s the story: https://esawebb.org/news/weic2406/?lang
Supermassive black hole binary pair, which have been resolved (!) and are separated by a mere 24 light-years (P_b = ~30,000 yrs) whilst suffering from the Final Parsec problem have had a new mass reported in this paper ... and the combined mass comes in at a whopping 28 billion Suns!
📷 a simulation of the density contours of the #Universe when it was a million years old (produced by J. Silk, A. Szalay and Ya. B. Zeldovich). This distribution later evolves into a large-scale distribution of #galaxies.