ScienceJuly 9, 2026

magnetosphere

/mæɡˈniːtəˌsfɪər/

Definition

The region surrounding a planet that is dominated and protected by its magnetic field, which shields the atmosphere from solar wind.

Etymology

The word is a combination of the Greek 'magnētis' (magnetic stone) and 'sphaira' (globe or ball). It was coined in the mid-20th century to describe the specific zone of influence created by a planet's magnetic field.

In the news

The article uses the term to contrast Earth's strong, protective magnetic shield with Mars's weak one, explaining why Mars lost its atmosphere over time. Understanding this structure is key to studying how space weather affects planets and technology.

At WVU, a NASA ESCAPADE researcher brings space science down to Earth

Read the full article ↗

My Buckhannon

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