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Emission, Reflection, and Dark Nebulae
Grade Level
Astronomy
AST.212 Emission, Reflection, and Dark Nebulae
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A nearby star is bright enough to illuminate dust but not hot enough to ionize much hydrogen. What appearance is most likely?
A
No nebular appearance, because dust cannot interact with visible light.
B
A bright H II emission nebula, because cool stars ionize hydrogen easily.
C
A dark nebula, because all illuminated dust must appear black.
D
A reflection nebula, because dust scatters the star's light.
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