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Astronomy · L3 · Nebula Types · flowchart

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by @openstemUpdated Astronomy
Interstellar cloud of gas and dustNearby hot, massive star ionises the gas?Emission nebula: glows red, H-alphaReflection nebula: glows blue, scattered lightDark nebula: black silhouetteYesNo, but nearby star lights the dustNo nearby bright star, cloud is dense

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