…a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction…
…the galaxy of which the solar system is a part; the Milky Way…
…a galaxy emitting radiation in the radio-frequency range of the electromagnetic spectrum…
…a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms…
…a galaxy of a type characterized by a bright compact core that shows strong infrared emission…
…a large northern constellation between Perseus and Pegasus, with few bright stars. It is chiefly notable for the Andromeda Galaxy (or Great Nebula of Andromeda), a conspicuous spiral galaxy probably twice as massive as our own and located two million light years away…
…a large northern constellation between Perseus and Pegasus, with few bright stars. It is chiefly notable for the Andromeda Galaxy (or Great Nebula of Andromeda), a conspicuous spiral galaxy probably twice as massive as our own and located two million light years away…
