Geography · Astronomy and Nebulae
What primary physical process occurs to the hydrogen gas in an emission nebula when the embedded stars are extremely hot?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Nuclear fusion begins spontaneously within the outer dust clouds
- 2The hydrogen atoms solidify into high-density cosmic ice structures
- 3The hydrogen becomes ionized and emits its own characteristic light✓
- 4The hydrogen undergoes continuous radioactive beta decay
Correct answer
The hydrogen becomes ionized and emits its own characteristic light
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