Does the existence of water on comets make human exploration of space any easier?
Aside from the existence of water, the lunar polar regions still represent an important resource.
The existence of water ice at the Moon's south pole was confirmed by the LCROSS spacecraft.
Their observations also confirmed the existence of water in the atmosphere of the planet, which had been reported in 2007 from observations made with NASA's Spitzer Space Telescope.
The existence of water vapour in a gas mixture reduces the partial pressures of the other component gases but does not alter the total pressure of the mixture.
And even though humans have not left footprints on Mars or on Europa, one of Jupiter's moons, our space robots have beamed back to us compelling evidence from these worlds of the existence of water.
It is responsible, for example, for the existence of water as a liquid at normal temperatures; because of its low molar mass, water would be expected to be a gas.
The intersecting fractures visible in Voyager images of Triton's surface provide strong corroborating evidence for the existence of water ice inside this moon, since no other candidates for Triton's subsurface composition expand as they freeze.
However, the Curiosity rover, which has been exploring the Gale crater on Mars just south of the equator since it landed there in 2012, has discovered evidence for the existence of water vapour the Martian atmosphere which can be absorbed by a perchlorate substance on the Martian surface to form a salty brine which acts as an antifreeze.
Thus possessing the concept requires the existence of water, meaning that the view entails (1).
