A young, very massive, and very dense star cluster.

(informal, humorous) A comical name for a person, typically derived from the name of their first pet and the name of the first street they lived on.

Antedon bifida, a crinoid in the family Antedonidae.

plural of blue hook star

(astronomy) a type of helium-burning blue giant star that is hotter than the average star in this stage of their life, due to having a more massive helium core

Under or in fortunate circumstances.

plural of proto-neutron star

(stars) The degenerate core of a massive star, prior to its emergence after a supernova as a neutron star.

(astronomy, informal) The star Fomalhaut.

(slang) A gay man who has never had sex with a woman.