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Home Q & A Board Science-Related Homework Help Physics
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doit_the_clown doit_the_clown
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7 years ago
When observing planetary motions from the Earth, the phrase “retrograde motion” refers to
A)   the apparent westward motion of the planet (and the Sun, the Moon, and stars) across the sky due to the rotation of the Earth.
B)   motion of the planet away from the Earth during part of its orbit.
C)   a slow eastward motion of the planet from night to night compared to the background stars.
D)   a slow westward motion of the planet from night to night compared to the background stars.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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papachulopapachulo
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7 years ago
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doit_the_clown Author
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7 years ago
Good timing, thanks!
Harvinder
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Yesterday
Thanks
Brownr40
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2 hours ago
Thank you, thank you, thank you!
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