Which of the following best describes what we mean by a habitable world?
A. a planet or moon that could support life, if any life happened to be on it
B. a planet or moon with life
C. a planet or moon that lies within its star's habitable zone
D. a planet or moon on which humans could survive if we happened to go there
Answer:A
Which of the following best describes what we mean by a habitable world?
A. a planet or moon that could support life, if any life happened to be on it B. a planet or moon with life C. a planet or moon that lies within its star's habitable zone D. a planet or moon on which humans could survive if we happened to go there