The difference in brightness between two stars is related to the
A) amount of light and energy produced by the stars.
B) relative size of the stars.
C) distance to the stars.
D) All of the above.
Correct Answer:
Verified
Q13: About how old is the universe?
A)6.0 billion
Q14: Where a main sequence star is located
Q15: Red giants are enormously bright because they
Q16: Earth rotates
A)from west to east.
B)from east to
Q17: Which of the following depends on your
Q19: The absolute magnitude considers the brightness of
Q20: Nuclear fusion reactions occur in what part
Q21: If the density of the universe is
Q22: The Milky Way galaxy is
A)spiral.
B)elliptical.
C)globular.
D)spherical.
Q23: The expected life span of a star
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