Which of these characteristics is NOT usually taken to be sufficient to rule out the existence of life on an extrasolar planet?
A) planet is too close to the star
B) star is 20 times more massive than the Sun
C) a planet in synchronous rotation around its star
D) star is older than the Sun
Correct Answer:
Verified
Q1: There are now over 3700 known extrasolar
Q2: Why is liquid water believed to be
Q4: Which type of meteorite was found to
Q5: In which type of meteorite has evidence
Q6: Is a planet with a large, nearby
Q7: One aspect of astrobiology is the attempt
Q8: Why is the strategy of searches for
Q9: Several lines of evidence now suggest that
Q10: The earliest searches for radio signals from
Q11: There have been many reports of aliens
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