http://astronomy.lamost.org/bbs/viewthread.php?tid=21&a […]
Observational surveys of elliptical galaxies at high redshift have in recent years revealed a further interesting fact: ellipticals at high redshift appear to be much smaller in size than those in our local Universe, but have about the same mass and density of stars.
http://astro.berkeley.edu/~jcohn/lya.html 1 why forest […]