Two doughnut-shaped zones of energetic charged particles trapped by Earth's magnetic field. The inner belt is at 1,000-5,000 km altitude, the outer at 15,000-25,000 km. Discovered by James Van Allen in 1958 using Explorer 1 data.
The region of space surrounding a planet dominated by its magnetic field. Earth's magnetosphere extends tens of thousand...
A continuous stream of charged particles from the Sun's corona at 300-800 km/s. It shapes planetary magnetospheres, driv...
A natural light display in Earth's sky, predominantly seen in high-latitude regions. Auroras are caused by charged parti...
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