Extraterrestrial water

A comet is an icy, small Solar System body or interstellar object that warms and begins to release gases when passing close to the Sun, a process called outgassing. This produces an extended, gravitationally unbound atmosphere or coma surrounding the nucleus, and sometimes a tail of gas and dust gas blown out from the coma. These phenomena are due to the effects of solar radiation and the outstreaming solar wind plasma acting upon the nucleus of the comet. Comet nuclei range from a few hundred meters to tens of kilometers across and are composed of loose collections of ice, dust, and small roc

area of the Solar System beyond the planetary orbits comprising small bodies

zone around the star with strong possibilities for stable liquid water and evolution of life

giant planet primarily composed of elements heavier than hydrogen and helium

main-belt Themistian asteroid

K2-18b, also known as EPIC 201912552 b, is an exoplanet orbiting the red dwarf K2-18, located away from Earth. The planet is a sub-Neptune about 2.6 times the radius of Earth, with a 33-day orbit within the star's habitable zone; it receives approximately a similar amount of light as the Earth receives from the Sun. Initially discovered with the Kepler space telescope, it was later observed by the James Webb Space Telescope (JWST) in order to study the planet's atmosphere.

asteroid

hypothetical type of planet whose surface is completely covered with an ocean of water with potential signs of life; in fiction see Q98807723

overview about physical and chemical properties of pure water

availability of water on Mars

water molecules present on the Moon, either as ice in permanently shadowed craters at the lunar poles, or as vapor in the thin lunar atmosphere

hot, water-covered planet with a hydrogen-rich atmosphere that may harbor lifeforms

exoplanet around TOI-700

extrasolar planet

water

exoplanet

study of oceans outside planet Earth

TOI-270, also known as L 231-32, is a red dwarf star away in the constellation Pictor. It has about 39% the mass and 38% the radius of the Sun, and a temperature of about . TOI-270 hosts a system of three known exoplanets.