Multiple Choice
What would be the main factors determining whether water can exist in a liquid state on the surface of a planet?
A) the presence of photosynthetic and highly intelligent life-forms
B) the age and mass of the central star
C) the atmospheric pressure and temperature on the planetary surface
D) the color and temperature of the central star
E) the existence of carbon-based biology
Correct Answer:
Verified
Correct Answer:
Verified
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