What effect do interstellar dust particles have on the appearance of a distant star?
A) They make it look bluer and brighter
B) They make it look bluer and dimmer
C) They make it look redder and brighter
D) They make it look redder and dimmer
Correct Answer:
Verified
Q9: The 21 cm line is emitted by
A)Hydrogen
Q10: The hydrogen in an HII region is
A)In
Q11: Why are HII regions red in color?
A)They
Q12: What kind of object creates an evacuated,very
Q13: What assumption about globular clusters did Harlow
Q15: The bluish color of the nebulosity around
Q16: What atom produces 21 cm radiation?
A)Hydrogen
B)Nitrogen
C)Silicon
D)Oxygen
Q17: A reflection nebula is produced when the
Q18: Astronomers of about the year 1900 didn't
Q19: What keeps the matter in an HII
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