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发帖数: 1994 | 1 A Proton Aurora
Credit: IMAGE Satellite, NASA
Explanation: What are auroras made out of? Most auroras are caused by the solar wind exciting electrons that are funneled down the Earth's magnetic field. These electrons strike air molecules, liberating other electrons that glow when re-acquired.
Sometimes, however, auroras composed mostly of heavier protons impact the Earth, causing a more energetic display with strong ultraviolet emission. A proton aurora captured by the IMAGE satellite in ultravi |
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