A 'galaxy' is a collection of stars and planets in one space orbiting a core or a very large star. The 'universe' holds all these Galaxy's and could be infinite. E.g. We live in one of millions of...
universe consists of many galaxies
(astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust is known as galaxy Everything that exists...
No matter in which direction we look, all of the galaxies outside of our "local cluster" are moving away from the earth. And get this ... the farther a galaxy already is from us, the faster it's...
Yes, the galaxies are moving. The universe is expanding, and galaxies are moving away from each other. That doesn't mean that every single galaxy is moving away from every other galaxy, because some...