C: Anywhere you look, it’s 90/9/1. Ninety percent hydrogen, 9% helium, 1% everything else. However, that 1% might be very different in different regions or in different clouds.
Review 02
Sections 11867, 11877
C: Anywhere you look, it’s 90/9/1. Ninety percent hydrogen, 9% helium, 1% everything else. However, that 1% might be very different in different regions or in different clouds.