Using a criterion based on an object's color, astronomers recently identified 23 galaxies so distant from Earth that their light has taken 85 percent of the age of the universe to reach us.
astronomers recently identified 23 galaxies so distant from Earth that their light has taken
astronomers recently identified 23 galaxies that were so distant from Earth for their light to take
astronomers recently identified 23 galaxies to be so distant from Earth such that their light takes
23 galaxies were recently identified by astronomers to be so distant from Earth for their light to take
23 galaxies were recently identified by astronomers as so distant from Earth their light has taken
-- by 会员 celiababy2 (2012/10/24 9:31:19)