十万个为什么·科学阅读30篇（1）

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科学常识延展阅读·自动延展（批次0001-020）

Auroras glow when charged solar particles collide with gases high in Earth’s atmosphere.
Oxygen atoms at very high altitudes emit rare red light, while lower ones produce green—the most common color.
Nitrogen molecules contribute blue or purplish hues, especially during intense geomagnetic storms.
The altitude of collisions determines which gases get excited and what color we see from the ground.
Solar wind speed and magnetic field orientation influence both aurora brightness and color variety.
Cameras with long exposures often capture colors invisible to the naked eye in low-light conditions.
Different planets show unique auroral colors based on their atmospheric composition—like Saturn’s ultraviolet glow.
Scientists use spectrometers to analyze aurora light and learn about upper-atmosphere chemistry.
Magnetic latitude matters too: people near the Arctic Circle see more vivid displays than those farther south.
Studying auroras helps us understand space weather effects on satellites and power grids.