Land is far from having the largest supply of water in the solar system
Many tend to think that the Earth is the only planet in the solar system, with enormous water reserves. However, in comparison to some other places in the solar system, our own world - a real desert, both in terms of total volume of water and the amount of liquid in the world relative to the size of the planet.
Get at least ice of Jupiter's moon Europa, which is less than the size of our moon. More recently, scientists have analyzed the old 20-year-old data from one space probe "Voyager" and found more evidence to suggest that water supplies in Europe in two times higher than those on our home planet. There are serious suspicions that even tiny Pluto has a subsurface ocean, by volume comparable to that of our earth.
Steve Vance, a planetary scientist from the Jet Propulsion Laboratory of NASA, for many years engaged in the research worlds that can hide under its surface water. He brought the average values of the thickness of the ice crust surface of the worlds of the solar system and the depth of the oceans, as well as to calculate how much water can be provided at these facilities.
On infographics below shows data obtained Vance, and information from other sources, indicating the likely volume of liquid water in nine known "water worlds" including our earth.
The amount of water on the chart reflected in zettalitrah, a unit equal to 1 billion 000 billion liters, or 1 billion cubic kilometers.
According to the National Oceanic and Atmospheric Administration, the earth has only about 1 3335 zettalitra.
Based on the fact the volume of water which a worlds solar system (from a smaller margin for greater), the list is as follows: Enceladus (Saturn), Triton (Neptune satellite), Dione (Saturn), Pluto (dwarf planet), Land, Europa (Jupiter's moon), Callisto (Jupiter's moon) Titan (Saturn's moon), and Ganymede (Jupiter's moon).
Ganymede is the largest moon of the gas giant Jupiter and the most "water" the world of the solar system for another reason: 69 percent of the total volume of the satellite can hold liquid water, which is significantly more than any other celestial body from the list above.
According to scientists, Mimas, Saturn and Ceres - the largest asteroid in the solar system, may also have oceans of water. However, researchers are not sure how large can the oceans. In order to certainly confirm or refute this opinion, it needs to spend more than one space mission. At the moment, NASA space agency is planning a mission to Europa Clipper Europe. Within its framework, scientists want to make a very accurate map of the icy moon. The researchers expect that the mission will begin somewhere between 2022 and 2025.
Scientists believe that the probe will be able to carry out more precise calculations of the ocean the size of Europe, as well as the "taste and smell" the particles of water geysers, escaping from the moon's surface.
The European Space Agency is planning a similar mission, called Jupiter Icy Moons Explorer. Its launch will take place in 2022. Reach Jupiter spacecraft will be in 2030-m.
As part of this mission, it is planned to hold two flyby of Europe. Then the spacecraft will take 8 months orbit around Ganymede, collecting scientific data and sending them back to Earth.
Who knows, maybe one of these probes discovered the first conclusive evidence for the existence of life in hundreds of millions of kilometers from Earth.