// NASA/ESA/M. Carollo ETH ZurichAs these galaxies are not any longer forming new stars, they were idea to grow by colliding and merging with other smaller quenched galaxies some five to 10 times less massive. However, these mergers could require many such small galaxies floating around for case look at answer quenched inhabitants to snack on, which astronomers don’t see. Until lately, it had not been possible to explore a adequate number of quenched galaxies, but now a team of astronomers has used observations from case study answer Hubble COSMOS survey to identify and count those switched off galaxies across case study solution last 8 billion years of cosmic historical past. ?The obvious puffing up of quenched galaxies has been one in every of case examine answer largest puzzles approximately galaxy evolution for many years,?said Marcella Carollo of case examine answer Federal Institute of Technology University ETH of Zurich, Switzerland. ?No unmarried collection of photos has been big sufficient to permit us to study very massive numbers of galaxies in precisely case look at answer same way until Hubble?s COSMOS,?said Nick Scoville of Caltech in Pasadena, California.
// NASA/ESA/M. Carollo ETH ZurichAs these galaxies are not any longer forming new stars, they were idea to grow by colliding and merging with other smaller quenched galaxies some five to 10 times less massive. However, these mergers could require many such small galaxies floating around for case look at answer quenched inhabitants to snack on, which astronomers don’t see. Until lately, it had not been possible to explore a adequate number of quenched galaxies, but now a team of astronomers has used observations from case study answer Hubble COSMOS survey to identify and count those switched off galaxies across case study solution last 8 billion years of cosmic historical past. ?The obvious puffing up of quenched galaxies has been one in every of case examine answer largest puzzles approximately galaxy evolution for many years,?said Marcella Carollo of case examine answer Federal Institute of Technology University ETH of Zurich, Switzerland. ?No unmarried collection of photos has been big sufficient to permit us to study very massive numbers of galaxies in precisely case look at answer same way until Hubble?s COSMOS,?said Nick Scoville of Caltech in Pasadena, California.