What is a protostar?
A) sphere of gas after collapse from an interstellar cloud but before nuclear reactions have begun
B) small interstellar cloud before it collapses to become a star
C) star near the end of its life before it explodes as a supernova
D) shell of gas left behind from the explosion of a star as a supernova
Correct Answer:
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Q69: Where are protostars MOST likely to form?
A)
Q70: Protostars are
A) very young objects still contracting
Q71: The Cygnus Loop Nebula is characterized by
Q72: In order to produce protoplanets around a
Q73: What is believed to be the MOST
Q75: Where in the universe would one look
Q76: The source of MOST of a protostar's
Q77: Which range of electromagnetic radiation is MOST
Q78: How does a dense core collapse to
Q79: At what stage in its life does
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