Van Allen belt

noun

Van Al·​len belt van-ˈa-lən- How to pronounce Van Allen belt (audio)
: a belt of intense radiation in the magnetosphere composed of energetic charged particles trapped by the earth's magnetic field
also : a similar belt surrounding another planet

Examples of Van Allen belt 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.
During the Polaris Dawn mission, Isaacman piloted the capsule through the intense radiation of the Van Allen belt in low Earth orbit, before leading a surreal spacewalk, backlit by a glowing blue globe, and then navigating the Dragon’s fiery atmospheric reentry. Kevin Holden Platt, Forbes, 23 Oct. 2024 SpaceX has said the findings could help with planning missions to the moon and eventually Mars, which would require astronauts to fly through the inner and outer Van Allen belts. Denise Chow, NBC News, 15 Sep. 2024 Polaris Dawn reaches the radiation belts The Van Allen belts trap concentrations of high-energy particles that come from the sun and interact with Earth’s atmosphere, creating two dangerous bands of radiation, according to NASA. Jackie Wattles, CNN, 14 Sep. 2024 The crew traveled through the Van Allen belts on their way to the furthest point in their journey, and, so far, the tech aboard the capsule — and the astronauts — seem to have withstood that radiation. Ellen Ioanes, Vox, 12 Sep. 2024 The Van Allen belts pose one of the largest hazards to spacefarers venturing deep into the cosmos. Eric Lagatta, USA TODAY, 10 Sep. 2024 Starfish Prime created a new artificial belt of radiation in low-Earth orbit and also increased the intensity of the existing Van Allen belts. Joshua Keating, Vox, 12 Apr. 2022 The satellite carried out an experiment to take measurements of the Van Allen belts and relay information to Earth in real time. Lorenzino Estrada, The Arizona Republic, 7 May 2024 After launching at 7:05 a.m., the unmanned Orion spacecraft raced 3,630 miles above the Earth’s surface and into the Van Allen belt — a radiation cloud shrouding the planet. Carl Engelking, Discover Magazine, 4 Dec. 2014

Word History

Etymology

after James A. van allen, credited with discovery of the belt

First Known Use

1958, in the meaning defined above

Time Traveler
The first known use of Van Allen belt was in 1958

Dictionary Entries Near Van Allen belt

Cite this Entry

“Van Allen belt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Van%20Allen%20belt. Accessed 22 Dec. 2024.

Kids Definition

Van Allen belt

noun
Van Al·​len belt va-ˌnal-ən- How to pronounce Van Allen belt (audio)
və-
: a belt of high-energy charged particles that surrounds the earth in the magnetosphere
Etymology

named for James A. Van Allen born 1914 American physicist

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!