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
Examples of magnetosphere in a Sentence
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Earth is surrounded by a system of magnetic fields, called the magnetosphere, that protects people from harmful space radiation.
—
Mary Kekatos, ABC News, 18 Mar. 2025
View Comments Earth’s magnetic field has behaved even more dramatically in the past, with the magnetosphere weakening so much that its polarity reversed.
—Mindy Weisberger, CNN, 21 Jan. 2025
Because of the way the solar particles interact with Earth's magnetosphere, the powerful eruption made the auroras visible and active even further toward the equator than usual.
—Eric Lagatta, USA TODAY, 11 Oct. 2024
With Earth’s axis perpendicular to the sun, a unique interaction between solar wind and Earth's magnetosphere weakens Earth’s magnetic field slightly.
—Jamie Carter, Forbes, 17 Mar. 2025
See All Example Sentences for magnetosphere
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Mary Kekatos, ABC News, 18 Mar. 2025
View Comments Earth’s magnetic field has behaved even more dramatically in the past, with the magnetosphere weakening so much that its polarity reversed.
—Mindy Weisberger, CNN, 21 Jan. 2025
Because of the way the solar particles interact with Earth's magnetosphere, the powerful eruption made the auroras visible and active even further toward the equator than usual.
—Eric Lagatta, USA TODAY, 11 Oct. 2024
With Earth’s axis perpendicular to the sun, a unique interaction between solar wind and Earth's magnetosphere weakens Earth’s magnetic field slightly.
—Jamie Carter, Forbes, 17 Mar. 2025
See All Example Sentences for magnetosphere
Cite this Entry
“Magnetosphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magnetosphere. Accessed 3 Apr. 2025.
Copy CitationKids 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
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