About how many times more luminous than our Sun is a young solar mass protostar just beginning convective contraction?
A) 2-5
B) 5-10
C) 10-100
D) 100-1000
E) a million
Question 2
Which of the following statements about Mars is not true?
A) We have landed spacecraft on its surface.
B) It is considered part of our inner solar system.
C) We could survive on Mars without spacesuits, as long as we brought oxygen in scuba tanks.
D) It has some liquid water today, but used to have large amounts of flowing water.
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