Which main- sequence stars are the most massive?
A) red
B) orange
C) yellow
D) blue
Correct Answer:
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Q7: Which color stars have the highest surface
Q8: The reason scientists believe the reflective bright
Q9: What was Hubble's major contribution to Cosmology?
A)
Q10: The red color of emission nebulae comes
Q11: Interstellar matter is composed primarily of_ .
A)
Q13: Which of the following events is not
Q14: Cepheid Variables are stars whose brightness varies
Q15: Fluorescence is a characteristic of _.
A) blue
Q16: Which main- sequence stars are the least
Q17: When viewed through an optical telescope, planetary
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