Documents Galaxies. A galaxy is made of billions of stars, dust, and gas all held together by gravity....

Galaxies Galaxies A galaxy is made of billions of stars, dust, and gas all held together by gravity. Galaxies are scattered throughout the Universe. They vary greatly in…

Documents Galaxies

Galaxies Galaxies A galaxy is made of billions of stars, dust, and gas all held together by gravity. Galaxies are scattered throughout the Universe. They vary greatly in…