Explanation: Today marks the 150^th anniversary of the discovery of Triton. On October 10 1846, William Lassell was observing the newly discovered planet Neptune. He was attempting to confirm his observation, made just the previous week, that Neptune had a ring. But this time he discovered that Neptune had a satellite as well. Lassell soon proved the ring was product of his new telescope's distortion, but the satellite Triton remained. The above picture of Triton was taken in 1989 by the only spacecraft ever to pass Triton: Voyager 2. Voyager 2 found fascinating terrain, a thin atmosphere, and even evidence for ice volcanoes on this world of peculiar orbit and spin. Ironically, Voyager 2 also confirmed the existence of complete thin rings around Neptune - but these would have been quite invisible to Lassell!

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: Neptun - Triton - kol'ca planet - KA Voyadzher Publikacii so slovami: Neptun - Triton - kol'ca planet - KA Voyadzher
Sm. takzhe: Neptun noch'yu Okruzhennyi kol'cami ledyanoi gigant Neptun Polumesyacy Neptuna i Tritona Kogda Mars vstrechaetsya s Neptunom Dva chasa do Neptuna Proletaya okolo sputnika Neptuna Tritona Neptun ot Voyadzhera Vse publikacii na tu zhe temu >>