Le Trifid Nebula.
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Transcribed Image Text:5. The two images below show a portion of the Trifid Nebula. The image on the left was
made with visible light, while the image on the right (shown to the same scale) is an infrared
image from the Spitzer Space Telescope. Explain why the dark streaks in the visible-light
image appear bright in the infrared image.
(a)
Reflection nebula,
Dust lanes
Emission nebula.
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(b)
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