Why is a 1-solar-mass red giant more luminous than a 1-solar-mass main-sequence star?
A) Fusion reactions are producing energy at a greater rate in the red giant.
B) The red giant has a hotter core.
C) The red giant's surface is hotter.
D) The red giant is more massive.
A) Fusion reactions are producing energy at a greater rate in the red giant.
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a. True b. False Indicate whether the statement is true or false
The _____ of a star is the time it takes the star to complete a cycle from bright to faint to bright again
A) life span B) luminosity period C) period of pulsation D) half-life
A "larger" Moon on the horizon is an optical illusion
a. True b. False Indicate whether the statement is true or false
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