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doit_the_clown doit_the_clown
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7 years ago
Mercury appears from spacecraft photographs to resemble the Moon in its surface features but with one important difference, which is
A)   the presence of extensive plains between craters, in contrast to the surface of the Moon.
B)   the presence of retrograde direction of spin compared to most other planets and moons.
C)   evidence of active volcanoes on Mercury.
D)   the presence of clouds and a measurable and significant atmosphere on Mercury.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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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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hyponoticahyponotica
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7 years ago
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