Which star spends the longest time in the protostellar phase of life?
A) a 1-solar-mass star
B) a 2-solar-mass star
C) a 3-solar-mass star
D) a 4-solar-mass star
E) a 5-solar-mass star
Answer: A
Which star spends the longest time in the protostellar phase of life?
A) a 1-solar-mass star
B) a 2-solar-mass star
C) a 3-solar-mass star
D) a 4-solar-mass star
E) a 5-solar-mass star
Answer: A