The giant planets.docx - The giant planets Neptune, Uranus,...

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The giant planetsNeptune, Uranus, Saturn and Jupiter are the giants of the solar system. Deep inside, and confined byvery high pressure, each of these is believed to contain several Earth-masses of water, sandwichedbetween its rocky core and its outer layers of hydrogen and helium gas.There is no feasible way to get at that water, but the giant planets each have numerous moons that aremade mostly of ice. Far from the sun, the ice contains methane, ammonia and carbon monoxide as wellas water. However, at the distance of Jupiter from the sun, only five times further out than the Earth, itwas too hot for the more volatile ices to condense, resulting in relatively pure water ice.There is compelling evidence that several icy moons have internal oceans. The best places to look for lifeare where the ocean overlies warm rock. This may be the case inside Europa (Jupiter) and Enceladus(Saturn), but chemical reactions with the rock would make the liquid water salty, so not good to drink.The rocky planets
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Term
Spring
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Tags
Solar System, Planet, Earth masses of water

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