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  2. Extraterrestrial liquid water - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_liquid_water

    However, water is only useful for life in a liquid state, and extraterrestrial water is commonly found as water vapor or ice. Liquid water also has several properties that are beneficial for lifeforms. For example, unlike most other liquids, it becomes less dense when it solidifies rather than denser.

  3. Extraterrestrial materials - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_materials

    Cosmic dust contains complex organic compounds (amorphous organic solids with a mixed aromatic-aliphatic structure) that can be created naturally by stars and radiation. [31] [32] [33] These compounds, in the presence of water and other habitable factors, are thought to have produced and spontaneously assembled the building blocks of life. [34 ...

  4. List of compounds - Wikipedia

    en.wikipedia.org/wiki/List_of_compounds

    Inorganic compounds by element; List of alloys; List of alkanes; List of elements by name; List of minerals – List of minerals with Wikipedia articles; List of alchemical substances; Polyatomic ion – Ion containing two or more atoms; Exotic molecules – Atoms composed of exotic particles can form compounds

  5. List of extrasolar candidates for liquid water - Wikipedia

    en.wikipedia.org/wiki/List_of_extrasolar...

    Four of the discovered planets, called TRAPPIST-1d, TRAPPIST-1e, TRAPPIST-1f and TRAPPIST-1g, are candidates for liquid water. They are all located towards the outer system (with the closest to the star, TRAPPIST-1d, being within or slightly outside the inner edge of the habitable zone ), making them cool planets.

  6. Water - Wikipedia

    en.wikipedia.org/wiki/Water

    Water is an inorganic compound with the chemical formula H 2 O.It is a transparent, tasteless, odorless, [c] and nearly colorless chemical substance.It is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent [20]).

  7. Tardigrades on the Moon - Wikipedia

    en.wikipedia.org/wiki/Tardigrades_on_the_moon

    They are also able to survive large doses of ionizing radiation and the vacuum of outer space. [ 9 ] [ 11 ] [ 3 ] Tardigrades are a valuable model organism for researching the possibility of life in space because of their exceptional ability to survive harsh environments, such as high radiation, desiccation, and extremely high temperatures.

  8. The water on Earth might have been delivered from space by ...

    www.aol.com/news/water-earth-might-delivered...

    When Earth formed around 4.6 billion years ago, some water likely existed in that gas and dust — though much of it would have been vaporized by the sun’s intense heat. How Earth got so much ...

  9. Properties of water - Wikipedia

    en.wikipedia.org/wiki/Properties_of_water

    Water is the chemical substance with chemical formula H 2 O; one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. [26] Water is a tasteless, odorless liquid at ambient temperature and pressure. Liquid water has weak absorption bands at wavelengths of around 750 nm which cause it to appear to have a blue color. [4]