Stellar

google

ref

mid 17th century: from late Latin stellaris, from Latin stella ‘star’.

wiktionary

ref

Borrowed from Latin stēllāris.

etymonline

ref

stellar (adj.)

1650s, "pertaining to stars, star-like," from Late Latin stellaris "pertaining to a star, starry," from stella "star," from PIE *sterla-, suffixed form of root *ster- (2) "star." Meaning "outstanding, leading" (1883) is from the theatrical sense of star.