magnetosphere

noun

mag·​ne·​to·​sphere mag-ˈnē-tə-ˌsfir How to pronounce magnetosphere (audio)
-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 How to pronounce magnetosphere (audio)
-ˈsfer-
-ˌne-
adjective

Examples of magnetosphere in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Given that its magnetosphere factory lies in the mantle layer rather than the core, the planet pays no heed to the centrality rules that govern typical magnetospheres. Shi En Kim, Smithsonian Magazine, 5 Nov. 2024 But by mining other data, the team behind the new analysis found evidence that an intense, temporary increase in solar wind likely squished Uranus’s magnetosphere at the time of the flyby, trapping plasma outside the probe’s sensors and filling the radiation belts with higher energy particles. Christie Wilcox, science.org, 12 Nov. 2024 When solar activity slows, Earth’s magnetosphere remains largely undisturbed, reducing the likelihood of geomagnetic storms — the critical catalyst for auroras. Jamie Carter, Forbes, 5 Dec. 2024 Because of the way the solar particles interact with Earth's magnetosphere, the powerful eruption should make the vibrant northern lights visible to a wider swath of the northern hemisphere than usual. Eric Lagatta, The Indianapolis Star, 28 Nov. 2024 See all Example Sentences for magnetosphere 

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

Time Traveler
The first known use of magnetosphere was in 1959

Dictionary Entries Near magnetosphere

Cite this Entry

“Magnetosphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magnetosphere. Accessed 18 Jan. 2025.

Kids Definition

magnetosphere

noun
mag·​ne·​to·​sphere mag-ˈnēt-ə-ˌsfi(ə)r How to pronounce magnetosphere (audio)
-ˈnet-
: a region of space around an object (as a planet or star) that is dominated by the object's magnetic field

More from Merriam-Webster on magnetosphere

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