Io torus

Io torus

(tor -ŭs, toh -rŭs) See Io; Jupiter.

Io torus

[¦ī‚ō ′tȯr·əs]
(astronomy)
A doughnut-shaped region of dense plasma that orbits Jupiter at the radial distance of the satellite Io and results from ionization by solar ultraviolet radiation of gases emitted from Io in volcanic eruptions.
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References in periodicals archive ?
Known as the Io torus, the ring is fueled by neutral oxygen and sulfur atoms spewed by volcanoes on Io, one of the planet's largest moons.
This gas cloud which surrounds the satellite's orbit is known as the Io Torus.