The bright outer sheath surrounding the nucleus of a comet is called the ____.
A) halo
B) corona
C) mare
D) coma
Correct Answer:
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Q1: Venus is much hotter than Earth because
Q2: The _ is a stream of electrons
Q4: A falling meteoroid that enters Earth's atmosphere
Q5: Some meteorites contain small, round grains about
Q6: _ hydrogen is a form of hydrogen
Q7: The Moon's _ are dry, barren, flat
Q8: Uranus and Neptune are enveloped in thick
Q9: _ is the largest planet in the
Q10: A(n) _ is an interplanetary orbiting body
Q11: Galileo thought that the Moon's maria were
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