These three sequential images of an erupting volcano on Neptune's large moon Triton were taken by NASA's Voyager 2 as the spacecraft approach the moon on Aug. 26, 1989. The images, taken about 45 minutes apart (top to bottom), show the geyser-like volcanic plume spewing an eight kilometer- (five mile-) tall cloud of fine, dark particles into ...

Plume streaks on Triton's southern polar cap. Triton's southern polar cap is marked by numerous streaks of dark material tracing the direction of prevailing winds. [23] Four active plumes stretching 8 km high and ejecting between 10 and 400 kg/s of material were observed by Voyager 2, two of which were designated as the Hili and Mahilani plumes.

2021年12月17日 · Voyager 2 observed unusual dark plumes on the icy moon Triton. Read on to learn what may cause this mysterious process.

1990年10月19日 · At least four active geyser-like eruptions were discovered in Voyager 2 images of Triton, Neptune's large satellite. The two best documented eruptions occur as columns of dark material rising to an altitude of about 8 kilometers where dark clouds of material are left suspended to drift downwind over 100 kilometers.

A several-kilometers-tall, geyser-like eruption of dark material is seen shooting almost straight up from the surface of Neptune's moon, Triton, in this NASA Voyager 2 image, acquired on Aug. 24, 1989, from a distance of 99,920 kilometers.

five-mile-tall, geyser-like plume of dark material has been discovered erupting from the surface of Neptune's moon Triton in one of the images returned last month to the Jet Propulsion Laboratory, Pasadena, Calif., by NASA's Voyager 2 spacecraft.

One model for the mechanism driving the plumes of the four active geyser-like eruptions observed by Voyager 2 on Triton is a heating up of nitrogen ice in a subsurface greenhouse environment, where nitrogen gas pressurized by solar heating explosively vents to the surface carrying clouds of ice and dark particles into the atmosphere.

ser-vations and characteristics of the plumes are described here. Our purpose is to document the scale, geometry, optical properties, and temporal behavior of the eruptions; to esti-mate some other properties from the obser-vations (eruption duration, wind velocities, particle properties, cloud properties, and mass fluxes); and to discuss simple...

2022年3月15日 · At least two active plumes were observed on Neptune's moon Triton during the Voyager 2 flyby in 1989. Models for Triton's plumes have previously been grouped into five hypotheses, two of which are primarily atmospheric phenomena and are generally considered unlikely, and three of which include eruptive processes and are plausible.

2021年12月9日 · An eruption model based on a solar-powered, solid-state greenhouse effect was previously considered the leading hypothesis for Triton's plumes, in part due to the proximity of the plumes to the subsolar latitude during the Voyager 2 flyby and the distribution of Triton's fans that are putatively deposits from former plumes.