The distance of a star from the earth can be found
A) only if it is part of a double-star system.
B) by comparing its intrinsic and apparent brightnesses.
C) from its color.
D) from its position in the HR diagram.
Correct Answer:
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Q23: The color of a relatively hot star
Q24: Stars whose intrinsic brightness and period of
Q28: If we know the surface temperature and
Q28: The star nearest to the sun is
Q30: Stars at the upper end of the
Q30: A star must have a certain minimum
Q32: The earth's magnetic field influences
A) comets.
B) meteoroids.
C)
Q33: Red giant stars
A) are not very bright.
B)
Q34: The main sequence on the HR diagram
Q39: There is a surprisingly small variation among
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