Why is the ninth month called September?
Old English steorra, from Proto-Germanic *sterron, *sternon (cf. Old Saxon sterro, Old Norse stjarna, Old Frisian stera, Dutch ster, Old High German sterro, German Stern, Gothic stairno), from PIE *ster- (cf. Sanskrit star-, Hittite shittar, Greek aster, astron, Latin stella, Breton sterenn, Welsh seren "star").
Astrological sense of "influence of planets and zodiac on human affairs" is recorded from mid-13c.; star-crossed is from "Romeo and Juliet" (1592). Stars as a ranking of quality for hotels, restaurants, etc. are attested from 1886, originally in Baedecker guides. Brass star as a police badge is recorded from 1859 (New York City).
1824, "perform the lead part" (said of actors, singers, etc.), from star (n.). Sporting sense is from 1916. Related: Starred; starring.
Note: Our own sun is a medium-sized star.
Note: Each star has a definite lifetime and dies when it uses up its supply of fuel. (See black hole, neutron star, supernova, and white dwarf.)
Note: All chemical elements heavier than helium are created in the center of stars and are returned to space when the star dies.
Note: New stars are forming constantly.