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.
That's because when the solar particles interact with Earth's magnetosphere, the powerful eruption should make the vibrant northern lights visible to more of the Northern Hemisphere. Eric Lagatta, USA TODAY, 24 Jan. 2025 Shielding the Earth from flows of solar wind, the magnetic field, also called the magnetosphere, preserves and protects Earth’s atmosphere from atmospheric erosion. Sam Walters, Discover Magazine, 7 Jan. 2025 Every 11 years, the sun's magnetic field reaches solar maximum, and this is when the CMEs interact with the Earth's magnetosphere, a protective magnetic field that surrounds our planet, sparking a geomagnetic storm. George Monastiriakos, Newsweek, 31 Dec. 2024 Lunar Environment Heliospheric X-ray Imager (LEXI) The Lunar Environment Heliospheric X-ray Imager (LEXI) will monitor the interaction of solar wind with Earth's magnetosphere, and how energy in that environment generates geomagnetic storms and space weather. Josh Dinner, Space.com, 14 Jan. 2025 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 31 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

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