Voie lactée : un objet vieux de 12,5 milliards d’années révèle une surprise majeure


A fresh analysis of Type Ia supernovae overturns a controversial 2025 claim that cosmic expansion is slowing.
The post New Supernova Study Confirms Universe’s Expansion is Still Accelerating appeared first on Sci.News: Breaking Science News.
Using NASA’s Chandra X-ray Observatory and ESA’s XMM-Newton satellite, astronomers identified a possible remnant of ancient stellar explosion just a few dozen light-years from Sagittarius A*, a supermassive black hole at the center of our Milky Way Galaxy.
The post Astronomers May Have Found Supernova Remnant near Milky Way’s Central Black Hole appeared first on Sci.News: Breaking Science News.
The giant planet’s bow shock isn’t just deflecting the solar wind, it’s acting as a powerful particle accelerator, firing electrons to relativistic energies of at least 1 MeV, according to a new analysis of data from NASA’s Juno spacecraft.
The post Jupiter Accelerates Electrons to Near-Light Speed, Offering Clues to Cosmic Ray Origins appeared first on Sci.News: Breaking Science News.






