What is the difference between brightness and luminosity?
A) These are different names for the same property.
B) Luminosity is how we see a star;brightness is how much light it emits.
C) Brightness is how we see a star;luminosity is how much light it emits.
D) Luminosity measures size;brightness measures temperature.
Correct Answer:
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Q18: If a star's measured parallax is 0.2
Q19: Parallax is used to measure
A) distance.
B) velocity.
C)
Q20: A star with the same luminosity as
Q21: Stars X and Y are 5 AU
Q22: Star E is the same temperature as
Q24: Stars of similar temperatures but different sizes
A)
Q25: Stars are made mostly of
A) helium.
B) oxygen.
C)
Q26: How many arcseconds are there in a
Q27: The fraction of mass in the Sun
Q28: Star A is a red star.Star B
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