protostellar
Adjective
Meaning
protostellar (not comparable)
(astronomy) Of or pertaining to a protostar.
Examples
The molecule was found around the protostellar binary IRAS 16293-2422, which is located 400 light years from Earth. citation citation Glycolaldehyde is needed to form ribonucleic acid, or RNA, which is similar in function to DNA.
Therefore, in today's photosphere the helium fraction is reduced, and the metallicity is only 84% of what it was in the protostellar phase (before nuclear fusion in the core started).