Multiple Choice
Approximately how many Earthlike planets with orbits closer than Mercury's are believed to exist in our Galaxy?
A) no more than 1 such planet per 10 stars
B) at least 1 such planet per 6 stars
C) at least 1 such planet per 2 stars
D) at least 2 such planets per star
Correct Answer:
Verified
Correct Answer:
Verified
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