Which main- sequence stars are the least massive?
A) red
B) orange
C) yellow
D) blue
Correct Answer:
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Q11: Interstellar matter is composed primarily of_ .
A)
Q12: Which main- sequence stars are the most
Q13: Which of the following events is not
Q14: Cepheid Variables are stars whose brightness varies
Q15: Fluorescence is a characteristic of _.
A) blue
Q17: When viewed through an optical telescope, planetary
Q18: Why did Hubble think the Cepheid variables
Q19: What two elements formed first?
A) protons and
Q20: The densest stars known to exist are
Q21: Balance for a main sequence star is
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