A star's brightness tells us
A) how much energy a star produces.
B) its surface temperature.
C) its rotational speed.
D) both how much energy it produces and its surface temperature.
Correct Answer:
Verified
Q1: We do not see stars in the
Q1: Polaris is always directly overhead at
A)the north
Q5: In which city is Polaris highest in
Q6: The North Star has very little apparent
Q7: How far is a light year?
A)nearly 10
Q10: Why does a star's color corresponds to
Q21: Which star will emit the shortest wavelength
Q24: Luminosity is
A)the total amount of light energy
Q28: A star's color tells us
A)how much energy
Q30: The stars Procyon and Betelgeuse both appear
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