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.
Nimmo’s team pinpointed the explosion responsible for the burst to the magnetosphere, a magnetically active area about 6,213 miles (10,000 kilometers) away from a rotating neutron star. Ashley Strickland, CNN, 24 Jan. 2025 The instrument will track how the magnetosphere expands and contracts, as well as other shape changes caused by varying strengths of solar wind from the vantage point of the moon, providing a unique, first global view of this activity. Andrew Jones, Space.com, 14 Jan. 2025 Why were scientists interested in Uranus' magnetosphere? Voyager 2's data on the magnetosphere surrounding Uranus has, for decades, left scientists perplexed. Eric Lagatta, USA TODAY, 12 Nov. 2024 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 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 13 Feb. 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!