The apparent size of an object based on the amount of sky it covers is called its ________.
A. shadow-width
B. diameter
C. angular size
D. horizon
E. celestial extent
Answer: C
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This painting shows an accretion disk around a black hole in a close binary star system. What physical law explains why matter flowing from the companion star orbits rapidly as it nears the black hole?
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The text states that luminous matter in the Milky Way seems to be much like the tip of an iceberg. This refers to the idea that
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