The major source of energy in the pre-main-sequence life of the Sun was
A) nuclear fusion.
B) burning of carbon atoms.
C) gravitation.
D) nuclear fission.
Correct Answer:
Verified
Q59: New stars are formed from
A) hot supernova
Q60: There are several mechanisms that can trigger
Q61: An open cluster has
A) a few hundred
Q62: Protostars, when they first form from the
Q63: Protostars are slowly
A) expanding at the surface
Q65: Parts of a supernova remnant become visible
A)
Q66: In which one of these locations are
Q67: The solar system could have formed from
Q68: Star formation takes place in
A) giant molecular
Q69: Where are protostars MOST likely to form?
A)
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