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What causes reflection nebulae to appear blue while emission nebulae appear pink?

mickied

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What causes reflection nebulae to appear blue while emission nebulae appear pink?

What causes reflection nebulae to appear blue while emission nebulae appear pink?

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Reflection nebulae contain less hydrogen than emission nebulae.

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Reflection nebulae are hotter than emission nebulae.

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Reflection nebulae are less ionized than emission nebulae.

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Long wavelengths of light are preferentially scattered by small dust grains.

Textbook

ASTRO

ASTRO

Edition: 3^rd

Authors: Ghose, Milosevic-Zdjelar, Read

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