Astronomers think that most comets come from _________.
A) interstellar space
B) material ejected by eruptions on the icy moons of the outer planets
C) a region of space between the orbits of Mars and Jupiter
D) small icy bodies in the extreme outer parts of the Solar System that are disturbed into orbits that bring them closer to the Sun
Correct Answer:
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Q52: Why are there two tails to some
Q53: In what direction does a comet's tail
Q54: A comet's tail _.
A) is gas and
Q55: The tail of a comet _.
A) points
Q56: Comet nuclei typically have an average density
Q58: What is the Kuiper belt?
A) a prize
Q59: What is the Oort cloud?
A) gas around
Q60: What are comets made of?
A) mostly iron,
Q61: Annual meteor showers such as the Perseids
Q62: What evidence supports the assumption that a
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