magnetosphere
nounUK /mæɡˈniːtəsfɪə/
US /mæɡˈniːtəsfɪr/
The big bubble of magnetic force around a planet that protects it from space radiation.
Earth's magnetosphere shields us from harmful particles coming from the Sun.
RELATED WORDS
OTHER MEANINGS
2. The region around a star or planet where its magnetic field controls charged particles.
Jupiter's magnetosphere is the largest in the solar system.
3. The magnetic environment surrounding a celestial body, studied in space physics.
Scientists mapped the magnetosphere using satellite data.
4. A protective magnetic zone that traps charged particles in belts around a planet.
The Van Allen belts sit inside Earth's magnetosphere.