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  2. Hycean planet - Wikipedia

    en.wikipedia.org/wiki/Hycean_planet

    Hycean planets have the ingredients that is necessary for life, including liquid water, energy, and organic molecules. [6] Their atmospheres may have less methane and ammonia than comparable non-hycean Neptune-like planets, if they have water oceans. [5] They might have a much higher free energy availability for their ecosystems than Earth. [15]

  3. Evidence of water on Mars found by Mars Reconnaissance ...

    en.wikipedia.org/wiki/Evidence_of_water_on_Mars...

    This means that Mars has lost a volume of water 6.5 times what is stored in today's polar caps. The water for a time would have formed an ocean in the low-lying Mare Boreum. The amount of water could have covered the planet about 140 meters, but was probably in an ocean that in places would be almost 1 mile deep. [1] [2]

  4. Marine biogeochemical cycles - Wikipedia

    en.wikipedia.org/wiki/Marine_biogeochemical_cycles

    Water as found in nature almost always includes dissolved substances, so water has been described as the "universal solvent" for its ability to dissolve so many substances. [3] [4] This ability allows it to be the "solvent of life" [5] Water is also the only common substance that exists as solid, liquid, and gas in normal terrestrial conditions ...

  5. Life on Mars - Wikipedia

    en.wikipedia.org/wiki/Life_on_Mars

    The volume of water detected has been estimated to be equivalent to the volume of water in Lake Superior. [ 116 ] [ 117 ] [ 118 ] Analysis of Martian sandstones, using data obtained from orbital spectrometry, suggests that the waters that previously existed on the surface of Mars would have had too high a salinity to support most Earth-like life.

  6. Dihydrogen monoxide parody - Wikipedia

    en.wikipedia.org/wiki/Dihydrogen_monoxide_parody

    Dihydrogen monoxide is a name for the water molecule, which comprises two hydrogen atoms and one oxygen atom (H 2 O).. The dihydrogen monoxide parody is a parody that involves referring to water by its unfamiliar chemical systematic name "dihydrogen monoxide" (DHMO, or the chemical formula H 2 O) and describing some properties of water in a particularly concerning manner — such as the ...

  7. Planetary habitability in the Solar System - Wikipedia

    en.wikipedia.org/wiki/Planetary_habitability_in...

    It comes frozen in meteorites and sublimates to vapor. The dwarf planet is out of the habitable zone, is too small to have sustained tectonic activity, and does not orbit a tidally disruptive body like the moons of the gas giants. [45] However, studies by the Dawn space probe confirmed that Ceres has liquid salt-enriched water underground. [49]

  8. Undine - Wikipedia

    en.wikipedia.org/wiki/Undine

    Paracelsus also emphasizes that even if the sylph/undine has returned to water, the marriage still remains valid, and she cannot be presumed to be dead, [25] another theme exploited by Fouquet's novella: thus, as her husband's transgression necessitates her departure into the watery world, she makes the insistence on her husband that his vow of ...

  9. Metallic hydrogen - Wikipedia

    en.wikipedia.org/wiki/Metallic_hydrogen

    Metastable metallic hydrogen may have potential as a highly efficient rocket propellant; the metallic form would be stored, and the energy of its decompression and conversion to the diatomic gaseous form when released through a nozzle used to generate thrust, with a theoretical specific impulse of up to 1700 seconds (for reference, the current ...