geocorona

[jee-oh-kuh-roh-nuh]

noun

1. a belt of ionized hydrogen surrounding the earth at the outer limit of the exosphere.

geocorona

1. The halo of far-ultraviolet solar light that reflects off the Earth's exosphere.

Other Word Forms

• geocoronal adjective

Word History and Origins

Origin of geocorona¹

First recorded in 1955–60; geo- + corona

Example Sentences

Carruthers also built a camera that, in 1972, was operated on the Moon by Apollo 16 astronauts, taking the first UV images of Earth’s geocorona.

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