fossil group n.— «All that dark matter makes astronomers think that NGC 1132 grew up through the mergers of many smaller galaxies in an entire group, drawn in by the dark matter. That’s why the galaxy is sometimes called a “fossil...
fossil group n.— «All that dark matter makes astronomers think that NGC 1132 grew up through the mergers of many smaller galaxies in an entire group, drawn in by the dark matter. That’s why the galaxy is sometimes called a “fossil...
