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 luminosity and brightness.
C) from its color.
D) from its position in the HR diagram.
Correct Answer:
Verified
Q30: A star must have a certain minimum
Q31: Neutron stars are about
A) the size of
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
Q36: White dwarf stars are not
A) comparable in
Q37: In order to determine the mass of
Q38: Auroras consist of
A) colored clouds.
B) comet tails.
C)
Q39: There is a surprisingly small variation among
Q40: The less the mass of a main-sequence
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