magnetosphere

noun

mag·​ne·​to·​sphere mag-ˈnē-tə-ˌsfir 

-ˈne-

: a region of space surrounding a celestial object (such as a planet or star) that is dominated by the object's magnetic field so that charged particles are trapped in it

magnetospheric

mag-ˌnē-tə-ˈsfir-ik 

-ˈsfer-

-ˌne-

adjective

Examples of magnetosphere in a Sentence

Recent Examples on the Web

As a result, the protective force field scientists call the magnetosphere became distorted and leaky. —Raven Garvey, Space.com, 24 July 2025

The satellites will observe how the sun's powerful activity interacts with our planet's magnetosphere. —Eric Lagatta, AZCentral.com, 22 July 2025

Each satellite carries a suite of instruments and tools for measuring how the Sun's hot, ionized gas impacts the magnetosphere. —Matthew Glasser, ABC News, 21 July 2025

This mission encompasses a pair of small spacecraft that will be sent to Mars to study the red planet's magnetosphere. —ArsTechnica, 4 July 2025

Word History

Etymology

magneto- + -sphere

Note: Term introduced by the Austrian-born physicist Thomas Gold (1920-2004) in "Motions in the Magnetosphere of the Earth," Journal of Geophysical Research, vol. 64, no. 9 (September, 1959), pp. 1219-24.

First Known Use

1959, in the meaning defined above

Rhymes for magnetosphere

• acyclovir
• asthenosphere
• ganciclovir
• atmosphere
• biosphere
• centromere
• chemosphere
• chromosphere
• hemisphere
• hydrosphere
• lithosphere
• mesosphere

Kids Definition

magnetosphere

noun

mag·​ne·​to·​sphere mag-ˈnēt-ə-ˌsfi(ə)r 

-ˈnet-

: a region of space around an object (as a planet or star) that is dominated by the object's magnetic field