Galaxies

Galaxies are tremendously large collections of stars, gas, and dust held together by the weakest force in the universe, gravity. There can be anywhere from a few million to nearly a trillion stars in individual galaxies. The structure of a galaxy defines its classification both by the size of its nucleus and the shape of its arms (or lack thereof). Galaxy classes include spiral, barred-spiral, elliptical, peculiar, and combinations thereof.  It is now well known that at the center of most galaxies is a super massive black hole containing thousands to millions of stellar masses compressed by gravity to an infinitesimally small point.

 

NGC 210

NGC 2782, Peculiar Galaxy

NGC 6384, Spiral Galaxy

NGC 7727, Clash of Titans

NGC 7331, Milky Way Twin

Supermassive Black Hole

NGC 6674

NGC 7217, Ringed Galaxy

NGC 891, Edge-on Spiral Galaxy

NGC 7479, Barred-Spiral Galaxy

NGC 7013, Spiral Galaxy