A(n)_______________ is a cluster of stars, dust, and gases surrounded by space, and is like an enormous island in the universe.
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Q50: The term for the two days of
Q51: What is the significance of the Tropic
Q52: Visible on the photosphere of the sun,
Q53: Explain how Eratosthenes used the rays of
Q54: During the _ solstice, the Arctic Circle
Q56: The color _ is associated with the
Q57: The _ marks the northernmost migration of
Q58: The term used to describe the period
Q59: Sunspot numbers vary over a cycle roughly
Q60: Because a year actually contains 365.25 days,
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