A nova involves
a) mass transfer onto a white dwarf in a binary star system.
b) repeated helium fusion flashes in red giants.
c) rapid collapse of a protostar into a massive O star.
d) the explosion of a low-mass star.
e) the birth of a massive star in a new cluster
Answer: a) mass transfer onto a white dwarf in a binary star system.
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Astronomy 101
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