Each of two regions of intense radiation partly surrounding the earth at heights of several thousand kilometres.
范艾伦（辐射）带
Example sentencesExamples
This so-called ‘safe-zone’ sits in between the radiation-stuffed Van Allen belts.
The invisible Van Allen belts that circle Earth in a region known as the magnetosphere trap much of this radiation and serve as an umbrella that protects people in low Earth orbit or below.
However, it could also be due to a trapped-particle belt around the star - much like the Van Allen belts surrounding the Earth - or even a disk of debris orbiting the star.
A 6000 kilometer area between the two Van Allen belts was previously thought to be a ‘safe zone’ where lighter, smaller, cheaper, and less heavily shielded satellites could operate.
Radiation from the Van Allen belt would kill any astronaut that spent enough time there.
Definition of Van Allen belt in US English:
Van Allen belt
noun
Each of two regions of intense radiation partly surrounding the earth at heights of several thousand kilometers.
范艾伦（辐射）带
Example sentencesExamples
This so-called ‘safe-zone’ sits in between the radiation-stuffed Van Allen belts.
However, it could also be due to a trapped-particle belt around the star - much like the Van Allen belts surrounding the Earth - or even a disk of debris orbiting the star.
A 6000 kilometer area between the two Van Allen belts was previously thought to be a ‘safe zone’ where lighter, smaller, cheaper, and less heavily shielded satellites could operate.
The invisible Van Allen belts that circle Earth in a region known as the magnetosphere trap much of this radiation and serve as an umbrella that protects people in low Earth orbit or below.
Radiation from the Van Allen belt would kill any astronaut that spent enough time there.