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staedtler staedtler
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7 years ago
1 AU or 1 astronomical unit is defined as
A)   the distance at which the Earth-Sun distance will subtend an angle of 1 arcsecond.
B)   the mean distance between the Sun and the Earth.
C)   the radius of the Sun.
D)   the distance traveled by light in 1 year.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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hyponoticahyponotica
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staedtler Author
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7 years ago
On behalf of my study group and I, thank you
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