Meaning & use
thermosphere
The layer of Earth's atmosphere above the mesosphere, where temperatures rise sharply with altitude due to solar radiation.
See it in a sentence
The International Space Station orbits within the lower part of the thermosphere.
Auroras occur when charged particles interact with gases in the thermosphere.
A note on using this word
Despite its extremely high temperatures, the thermosphere would not feel hot to a person, because the air there is far too thin to transfer heat effectively.
Words with a similar meaning
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