Multiple Choice
The results of statistical studies of the exoplanet systems discovered to date suggests that what proportion of stars are likely to have a planet less than half the size of the Earth and in an orbit within a star's habitable zone?
A) 10 to 20%
B) 50%
C) much less than 10%
D) more than 90%
Correct Answer:
Verified
Correct Answer:
Verified
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