Tag Archives: Ultra-Massive
Mysterious Ultra-Massive Galaxies Spotted in Early Universe
Top Stories Tamfitronics Astronomers using the NASA/ESA/CSA James Webb Space Telescope have discovered three ultra-massive galaxies — nearly as massive as our own Milky Way Galaxy — already in place within the first billion years after the Big Bang. Part of the JWST/FRESCO survey, this discovery indicates that stars in the early Universe grew much more rapidly than previously thought, challenging existing galaxy formation models.The three red monster galaxies discovered by Webb. Image credit: NASA / CSA / ESA / M. Xiao & P. A. Oesch, University of Geneva / G. Brammer, Niels Bohr Institute / Dawn JWST Archive.Until now, it was believed that all galaxies formed gradually within large halos of dark matter.Dark matter halos capture gas (atoms and molecules) into gravitationally bound structures.Typically, 20% of this gas, at most, is converted into stars...
