When the Sun was younger, how did its habitable zone compare with its habitable zone today?
A) narrower and closer to the Sun
B) narrower and farther from the Sun
C) wider and closer to the Sun
D) wider and farther from the Sun
A
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If you view a hot star through a cool cloud of gas, what sort of spectrum will you see?
A) water B) continuous C) absorption D) emission E) No spectrum is visible.
the space time interval between the events?
A. Jennifer B. Rob C. The train passengers
Suppose the angular separation of two stars is smaller than the angular resolution of your eyes. How will the stars appear to your eyes?
A) You will not be able to see these two stars at all. B) The two stars will look like a single point of light. C) The two stars will appear to be touching, looking rather like a small dumbbell. D) You will see two distinct stars. E) You will see only the larger of the two stars, not the smaller one.
What features of the telescopic view of the Andromeda Galaxy, M-31, are also visible to the naked eye for our similar Galaxy?
What will be an ideal response?