astrophysical

adj

Etymology: Etymology tree Proto-Indo-European *h₂eHs- Proto-Indo-European *-tḗr Proto-Indo-European *h₂stḗr Proto-Hellenic *astḗr Ancient Greek ἀστήρ (astḗr) Ancient Greek ᾰ̓́στρον (ắstron)der. English astro- English physical English astrophysical From astro- + physical.

1. Of or pertaining to astrophysics.

   “But many important astrophysical and atomic processes involving hydrogen, the most abundant element in the universe and in stars, give off ultraviolet light.”