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The geology of Triton encompasses the physical characteristics of the surface, internal structure, and geological history of Neptune's largest moon Triton. With a mean density of 2.061 g/cm 3 , [ 1 ] Triton is roughly 15-35% water ice by mass; Triton is a differentiated body, with an icy solid crust atop a probable subsurface ocean and a rocky ...
K2-18 is an M dwarf of the spectral class M3V [4] in the constellation Leo, [5] 38.025 ± 0.079 parsecs (124.02 ± 0.26 ly) away from the Sun. [1] The star is colder and smaller than the Sun, having a temperature of 3,457 K (3,184 °C; 5,763 °F) and a radius 45% of the Sun's, [6] and is not visible to the naked eye. [7]
Neptune's more varied weather when compared to Uranus is due in part to its higher internal heating. The upper regions of Neptune's troposphere reach a low temperature of 51.8 K (−221.3 °C). At a depth where the atmospheric pressure equals 1 bar (100 kPa), the temperature is 72.00 K (−201.15 °C). [128]
However, these moons are at higher temperatures than TNOs and are icier than TNOs are likely to be. Estimates from an IAU question-and-answer press release from 2006, giving 800 km radius and 0.5 × 10 21 kg mass as cut-offs that normally would be enough for hydrostatic equilibrium, while stating that observation would be needed to determine ...
The temperature of Triton's upper atmosphere, at 95 ± 5 K, is higher than that at its surface, due to heat absorbed from solar radiation and Neptune's magnetosphere. [ 48 ] [ 53 ] A haze permeates most of Triton's troposphere, thought to be composed largely of hydrocarbons and nitriles created by the action of sunlight on methane.
This is only 1/70,000th of the surface pressure on Earth. [6] The surface temperature was at least 35.6 K (−237.6 °C) because Triton's nitrogen ice is in the warmer, hexagonal crystalline state, and the phase transition between hexagonal and cubic nitrogen ice occurs at that temperature. [21]
No less of a challenge, it will need to operate in the harsh lunar environment of extreme temperatures and radiation. The 4G network unit is being built by Nokia’s Bell Labs using a range of off ...
The pressure on Triton's surface is about 14 μbar. [26] In 1989 the Voyager 2 spacecraft observed what appeared to be clouds and hazes in this thin atmosphere. [6] Triton is one of the coldest bodies in the Solar System, with a surface temperature of about 38 K (−235.2 °C). [26]