A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and ... However, the word Universe was later understood to mean the entirety of existence, so this expression fell into disuse and the objects instead ...
Galaxy definition, a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. See more.
A galaxy is a collection of stars and planets that are held together by gravity. In a galaxy, the celestial bodies rotate around a central object.
Sep 8, 2015 ... We live on a planet called Earth that is part of our solar system. But where is our solar system? It's a small part of the Milky Way Galaxy.
a system of millions or billions of stars, together with ... Meaning, pronunciation, example sentences, and more from Oxford Dictionaries.
Sep 17, 2012 ... If there were only major galaxies with spiral arms, like Andromeda and the Milky Way, then a formal definition might not be necessary – you ...
galaxy definition, meaning, what is galaxy: one of the independent groups of stars in the universe. Learn more.
Galaxy definition: A galaxy is an extremely large group of stars and planets that extends over many billions... | Meaning, pronunciation, translations and ...