The extinction of starlight due to the interstellar medium 
A) I & III
B) II & III
C) I & IV
D) II & IV
E) only IV
Correct Answer:
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Q1: To an observer on Earth,dust in the
Q2: Coronal gas radiates energy at
A) gamma-ray wavelengths.
B)
Q3: Radiation with a wavelength of 21-cm is
Q4: Absorption lines produced by the interstellar medium
Q6: The presence of forbidden lines in the
Q7: The local bubble
A) is a high temperature
Q8: Extinction by the interstellar medium dims starlight
Q10: Which of the following is not evidence
Q11: The air inside two balloons has the
Q39: Absorption lines due to interstellar gas
A) are
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