The Van Allen Belts

The Van Allen Belts

The Van Allen radiation belts are two layers of energetic charged particles trapped by Earth’s magnetic field. They form a protective shield around the planet, blocking much of the dangerous…
How Earth’s Axis Changes

How Earth’s Axis Changes

The Earth does not stand perfectly still as it spins; its axis of rotation—the imaginary line running through the North and South Poles—slowly shifts over time. This change in Earth’s…