To measure vast distances in the solar system, astronomers use the ____, the Earth's average distance from the Sun.
A) parsec
B) astronomical unit
C) light-year
D) click
E) mega-kilometers
Correct Answer:
Verified
Q22: The four planets nearest the sun are
Q23: _ is the closest moon to Jupiter
Q24: Our galaxy is called the _.
A) Oort
Q25: Perhaps the most obvious of _ surface
Q26: The Earth's atmosphere is rich in _,
Q28: Heat left over from this planetary formation
Q29: The sun, its eight planets and their
Q30: To the best of our knowledge, the
Q31: Astronomers estimate that our galaxy contains _
Q32: As planetismals struck the growing Earth, their
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