Multiple Choice
A star's apparent magnitude is a measure of ...
A) how bright it appears to us if it is at its actual distance.
B) how bright it appears to us at a standard distance of 10 pc.
C) its energy output per second compared to the sun.
D) its mass in solar masses.
E) its surface temperature in degrees Kelvin.
Correct Answer:

Verified
Correct Answer:
Verified
Q25: Use the following chart to answer the
Q26: If a star has a parallax of
Q31: The mass of a visual binary pair
Q32: Giant stars are <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB7781/.jpg" alt="Giant stars
Q33: The most accurate way to determine the
Q45: In the H-R diagram, 90 percent of
Q69: Luminosity class IV objects are known as
Q77: Doppler-shift observations of a spectroscopic binary star
Q79: We know that giant stars are larger
Q99: A star's absolute magnitude depends only on