Multiple Choice
Why are dark dust clouds largely misnamed?
A) The cloud is an illusion, for the dust is evenly distributed around the Galaxy.
B) Dust clouds do radiate energy, but not as much light as the stars do.
C) It is ice, not dust, which make them look dark.
D) They contain much more gas than dust.
E) All of the above are correct.
Correct Answer:
Verified
Correct Answer:
Verified
Q2: Interstellar gas is composed of:<br>A)only hydrogen.<br>B)90% hydrogen,
Q3: The overall dimming of starlight by interstellar
Q4: The average temperature of the typical dark
Q5: Why is 21-cm radiation so important to
Q6: Explain the colors of emission nebulae.
Q8: Emission nebulae like M42 occur only near
Q9: If dark nebulae are really dark, how
Q10: What does the polarization of starlight tell
Q11: The gas in the interstellar medium consists
Q12: What are the properties of the neutral