----------------------------------- zod 03 Dec 2017 00:58 ----------------------------------- VENUSFORMAREA TERREI :lol: Cred ca nici de asta n-am fi in stare inainte sa disparem ca specie. Apropo, nu e suficient sa racesti doar atmosfera de pe Venus, mai tre' sa racesti si scoarta, si o parte din manta ... Cel mai "rece" loc pe suprafata lui Venus ar fi in varful Maxwell Montes, doar 380 C / 44 atm. Este si zapada pe acolo ... un fel de zapada metalica. Ar merge si o bere ... pe baza de staniu. Alte planete sunt deja bune pentru baze submarine: Ceres, Europa, Ganimede, Calisto, Enceladus, Miranda, Titan, Oberon, Umbriel, Theia, Triton, samd Gheata ofera protectie antiradiatii, iar gravitatia slaba ofera conditii mai bune in submersie, plus constructia de habitate prin topirea ghetii si realizarea de galerii. Ceres is more similar to the terrestrial planets (Mercury, Venus, Earth and Mars) than its asteroid neighbors, but it is much less dense. One of the similarities is a layered interior, but Ceres' layers aren't as clearly defined. Ceres probably has a solid core and a mantle made of water ice. In fact, Ceres could be composed of as much as 25 percent water. If that is correct, Ceres has more water than Earth does. Ceres' crust is rocky and dusty with large salt deposits. The salts on Ceres aren't like table salt (sodium chloride), but instead are made of different minerals like magnesium sulfate. Surface Ceres is covered in countless small, young craters, but none are larger than 175 miles (280 kilometers) in diameter. This is surprising, given that the dwarf planet must have been hit by numerous large asteroids during its 4.5 billion-year lifetime. The lack of craters might be due to layers of ice just below the surface. The surface features could smooth out over time if ice or another lower-density material, such as salt, is just below the surface. It's also possible that past hydrothermal activity, such as ice volcanoes, erased some large craters. Within some of Ceres' craters, there are regions that are always in shadow. It's possible that without direct sunlight, these "cold traps" could have water ice in them for long periods of time. Atmosphere Ceres has a very thin atmosphere, and there is evidence it contains water vapor. The vapor may be produced by ice volcanoes or by ice near the surface sublimating (transforming from solid to gas).