Galaxies
Galaxies are huge concentrations of stars, gases, planets and other stellar material all bound together by a central structure such as that of a super massive black hole. Our own milky is no different and follows this same formula
Andromeda Galaxy (M31)
Cigar Galaxy (M82) and Bode's Galaxy (M81)
Triangulum Galaxy (M33)
Deer Lick Galaxy Group (NGC 7331) and Stephan's Quintet
The Leo Triplet of Galaxies (M65, M66, NGC 3628)