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Which "sphere" does an astronomer most directly study? a. biosphere b. exosphere c. geosphere d. cryosphere E. atmosphere F. hydrosphere
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Which "sphere" does an astronomer most directly study?

a. biosphere
b. exosphere
c. geosphere
d. cryosphere E. atmosphere F. hydrosphere

User Perelin
by
7.6k points

1 Answer

7 votes
b. exosphere. just remember they exit our world.
User Nakima
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