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Io torus

Io torus

(tor -ŭs, toh -rŭs) See Io; Jupiter.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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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.
It also provided the exceptionally good traverse of the Io torus."
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