magnetosphere マイ単語帳に追加

磁気圏

the magnetic field of a planet; the volume around the planet in which charged particles are subject more to the planet's magnetic field than to the solar magnetic field.

地球の磁場。荷電粒子が太陽磁場よりも地球の磁場の影響下にあって地球を取り巻く領域。