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Why Do Nebulae Have Different Colors and What Causes the Hydrogen and Oxygen of the Nebulae To Glow?

April 26, 2017causes colors different glow Hydrogen nebulae oxygen

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Why Do Nebulae Have Different Colors and What Causes the Hydrogen and Oxygen of the Nebulae To Glow?

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There are three kinds of nebulae, based on the light they reflect. Emission nebulae glow greenish-yellow and red. This is caused by the nearby presence of one or more extremely hot stars. The ultraviolet radiation from the stars causes the hydrogen and oxygen of the nebulae to glow. Reflection nebulae contain one or more cooler