The Helium abundance in the current universe
a) is due partly to the Big Bang and partly to stellar nucleosynthesis
b) is due only to the Big Bang
c) is due only to stellar evolution
d) is unknown at large scales
Answer: A
The Helium abundance in the current universe
a) is due partly to the Big Bang and partly to stellar nucleosynthesis
b) is due only to the Big Bang
c) is due only to stellar evolution
d) is unknown at large scales