Life will most likely be able to appear and evolve on a planet around which stage of a star's life?
A) core hydrogen-fusion
B) shell helium-fusion
C) core helium-fusion
D) shell hydrogen-fusion
Correct Answer:
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Q25: When a low mass star like our
Q26: Even though K- and M-type stars are
Q27: B-type stars have lifetimes
A) long enough for
Q28: Brown dwarfs have
A) very narrow habitable zones
B)
Q29: O-type stars
A) have lifetimes long enough for
Q31: Which of the following types of stars
Q32: In most extrasolar planetary systems the center
Q33: Life may be less likely around A-
Q34: Brown dwarfs are
A) stars in the process
Q35: A- and F-type stars
A) do not contain
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