Messier 87 (M87), also known as Virgo A or NGC 4486, is a supergiant elliptical galaxy in the Virgo constellation. It is one ...

Charles Messier also produced a catalog of over 100 prominent nebulae in 1781. Messier was interested in comets, so his list was a set of fuzzy objects that might be mistaken for comets.

He believed that the nebulae were objects within the Milky Way. Charles Messier also produced a catalog of over 100 prominent nebulae in 1781. Messier was interested in comets, so his list was a ...

Since then, thousands more have been identified and described in surveys like the Abell Catalog of Planetary Nebulae and the Messier catalogue. Nebulae are mostly found within galaxies ...