What is the Oort cloud?
A) gas around a comet's head
B) the glowing light around a meteor as it burns up
C) a region in the outer Solar System from which comets come
D) a zone between the Sun and Mercury where comets burn up and release their gases
E) the gas boiled off a comet that forms its tail
Correct Answer:
Verified
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
Q57: Astronomers think that most comets come from
Q58: What is the Kuiper belt?
A) a prize
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
Q63: What evidence do we have that an
Q64: Why can a rather small meteorite make
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