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- THE recent Voyager encounter established certain facts about Triton's atmosphere: the surface pressure is in the range 1.5–1.9 Pa (15–19 μbar) 1; the surface temperature is 38±3K (ref. 2); molecular nitrogen is the dominant atmospheric constituent 3; hazes and clouds are visible not only on the limb but also against the surface 4; the wind in the southern hemisphere is to the northeast at low altitudes (as shown by streaks on the surface 4) and to the west at high altitudes (as shown by...
www.nature.com/articles/344315a0
Aug 6, 2020 · Voyager 2’s observations exposed its icy surface, at equilibrium with a tenuous atmosphere, measuring a pressure of just 14 micro-bar (McKinnon and Kirk, 2014, In: Encyclopedia of the Solar System, pp. 861-881). Images showed a variety of morphologies consistent with recent geological activity.
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They concluded that Triton’s temperatures and atmospheric pressure have increased slightly since its encounter with Voyager 2, thus supporting earlier predictions of significant seasonal changes on Triton.
Mar 22, 1990 · THE recent Voyager encounter established certain facts about Triton's atmosphere: the surface pressure is in the range 1.5–1.9 Pa (15–19 μbar) 1; the surface temperature is 38±3K (ref. 2);...
- Andrew P. Ingersoll
- 1990
When Voyager 2 passed behind Saturn, viewed from Earth, it utilized its radio link to investigate Saturn's upper atmosphere, gathering data on both temperature and pressure. In the highest regions of the atmosphere, where the pressure was measured at 70 mbar (1.0 psi), [44] Voyager 2 recorded a temperature of 82 K (−191.2 °C; −312.1 °F).
During the flyby, Voyager 2 took measurements of the atmosphere, [30] finding methane and nitrogen in the atmosphere. [14] Voyager 2 also captured at least two plumes erupting through the nitrogen ice of Triton, and this is the first evidence of active plumes on an icy world such as Triton.
While Voyager 2 was behind Saturn, its radio beam penetrated the upper atmosphere, and measured temperature and density. Minimum temperatures of 82 Kelvins (-312 degrees Fahrenheit) were found at the 70-millibar level (surface pressure on Earth is 1,000 millibars).
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Did Voyager study Neptune and Triton?
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Aug 26, 2019 · Despite Triton’s frigid -392o F surface temperature, Voyager’s images revealed evidence of geysers spewing dark material into the moon’s tenuous atmosphere that deposited back onto the surface. Voyager passed behind both Neptune and Triton, with instruments returning data about their atmospheres.
