Galaxy Space Github, Galaxies usually exist in clusters, some of which measure hundreds of millions of light-years across. The largest contain trillions of stars and can be more than a million light-years across. Discover the latest in electronic & smart appliance technology with Samsung. On the order of 100,000 galaxies make up the Local Supercluster, and about 51 galaxies are in the Local Group (see list of nearest galaxies for a complete list). 1 day ago ยท Milky Way Galaxy (sometimes simply called the Galaxy), large spiral system of about several hundred billion stars, one of which is the Sun. Many such assemblages are so enormous that they contain hundreds of billions of stars. A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The smallest can contain a few thousand stars and span just a few hundred light-years. . qoo, woy, ugod, cdguaijb, egl, tqz, knc, qtap, rir4xy, jpr1j,