The Avestan word star-
Word star-
Meaning star
See also Homeric Greek: ἀστήρ ‘star’
Proto-Indo-European: *h₂stḗr ‘star’
Armenian: astł ‘star’
Latin: astrum ‘star, constellation’
Old Norse: stjarna ‘star’
Hittite: ḫa-aš-te-er ‘star’
Proto-Celtic: *ster ‘star’

Other words that might be of interest
hvarə ‘sun’, huuar- ‘sun’, māh- ‘moon’, asman- ‘stone, sky’, snaēžā ‘snow’