Search results
Results From The WOW.Com Content Network
Callisto (/ k ə ˈ l ɪ s t oʊ / kə-LIST-oh), or Jupiter IV, is the second-largest moon of Jupiter, after Ganymede.In the Solar System it is the third-largest moon after Ganymede and Saturn's largest moon Titan, and nearly as large as the smallest planet Mercury.
Callisto is surrounded by an extremely thin atmosphere composed of carbon dioxide [49] and probably molecular oxygen. [50] Investigation revealed that Callisto may possibly have a subsurface ocean of liquid water at depths less than 300 kilometres. [51] The likely presence of an ocean within Callisto indicates that it can or could harbour life.
This is a list of named geological features on Callisto, a moon of Jupiter. This list is complete as of August 2022. Catenae ...
Io (1.9 nbar) and Callisto (26 pbar) have very thin atmospheres, but still enough to have collisions between atmospheric molecules. Other planetary-mass moons only have exospheres at most. [ 26 ] Exospheres have been detected around Earth's Moon, Europa, Ganymede, [ 26 ] Enceladus, [ 27 ] Dione, [ 28 ] and Rhea. [ 29 ]
NASA's Galileo ' s measurements suggest that large moons can have magnetic fields; it found Ganymede has its own magnetosphere, even though its mass is only 2.5% of Earth's. [18] Alternatively, the moon's atmosphere may be constantly replenished by gases from subsurface sources, as thought by some scientists to be the case with Titan. [21]
Snow occurs when the atmosphere is "cold" all the way from the clouds to down here at the surface. And rain occurs when it's "warm" all the way from the clouds to the surface.
Neptune has 16 known moons; the largest, Triton, accounts for more than 99.5 percent of all the mass orbiting the planet. Triton is large enough to have achieved hydrostatic equilibrium, but, uniquely for a large moon, has a retrograde orbit, suggesting it was a dwarf planet that was captured.
The most intense scenario, which has 400 million tons of dust swirling in Earth’s atmosphere, would lead to a global “impact winter,” or a period of cold temperatures, reduced sunlight and ...