: one of the very large groups of stars, gas, and dust that make up the universe
Word History of GALAXY
The band of light that crosses a clear night sky is caused by many faint stars. We call this band the Milky Way because it looks a bit like a stream of milk. The stars of the Milky Way belong to our galaxy, the Milky Way galaxy. The idea that the Milky Way looks like milk is much older than the English language, however. The ancient Greek name for this star system, galaxias, was formed from the Greek word gala, “milk.” The English word galaxy was borrowed from the Greek name.