Earth’s Magnetic Field: The Planet’s Invisible Shield

Earth’s magnetic field is generated by molten iron moving in its outer core.
It extends far into space, forming a protective bubble called the magnetosphere.
This invisible shield deflects most of the Sun’s harmful charged particles.
Without it, solar wind would strip away Earth’s atmosphere over time.
The field guides compass needles, helping humans navigate for centuries.
Shifting currents in Earth’s core slowly move the magnetic poles.
The poles even flip every few hundred thousand years in magnetic reversals.
The field isn’t uniform—some regions, like the South Atlantic Anomaly, are weaker.
Solar storms interacting with the field create dazzling auroras near the poles.
Earth’s magnetic field is one big reason our planet is habitable.