Månens is

Direkte evidens for månevand i Månens atmosfære, gennem Chandrayaan-1 Chandra's Altitudinal Composition (CHACE) output profil
Billederne viser fordelingen af overfladeis på Månens sydpol (venstre) og nordpol (højre), fundet af NASA's Moon Mineralogy Mapper instrument.
Disse billeder viser et meget ungt månekrater på den side af månen der vender væk fra Jorden, som set fra Chandrayaan-1's Moon Mineralogy Mapper (M3) spektrometer

Månens vand er vand, der er til stede på Månen. Flydende vand kan ikke være til stede på Månens overflade, og vanddamp nedbrydes af sollys, hvor brint hurtigt går tabt til det ydre rum. Men forskerne har  siden 1960'erne formodet, at vand-is kunne overleve i kolde, permanent skygget kratere ved Månens poler. Vandmolekyler er også påvist i det tynde lag af gasser over månens overflade.[1][2]

Vand (H2O), og den kemisk beslægtet hydroxyl gruppe (-OH), kan også findes i former, der er kemisk bundet som fugter og - hydroxider til månens mineraler (snarere end frit vand), og videnskabelig dokumentation tyder stærkt på, at dette faktisk er tilfældet i lave koncentrationer over en stor del af Månens overflade.[3] Faktisk er adsorberet vand beregnet til at eksistere med sporkoncentrationer fra 10 til 1000 ppm.[4] I 1978 blev det rapporteret, at prøver fra den Sovjetiske Luna 24 sonde indeholdt 0.1 % vand i masseprøven.[5][6] Ikke-entydigt evidens for frit vand-is på månens poler blev samlet fra en række observationer, der tyder på tilstedeværelsen af bundet hydrogen.

Se også

Missioner

Referencer

  1. ^ "Atmosphere of the Moon". space.com. Hentet 2015-05-25.
  2. ^ "Is There an Atmosphere on the Moon? | NASA". nasa.gov. Arkiveret fra originalen 2. november 2019. Hentet 2015-05-25.
  3. ^ Lucey, Paul G. (23. oktober 2009). "A Lunar Waterworld". Science. 326 (5952): 531-532. Bibcode:2009Sci...326..531L. doi:10.1126/science.1181471. PMID 19779147. Hentet 2009-11-18.
  4. ^ Clark, Roger N. (23. oktober 2009). "Detection of Adsorbed Water and Hydroxyl on the Moon". Science. 326 (5952): 562-564. Bibcode:2009Sci...326..562C. doi:10.1126/science.1178105. PMID 19779152. Hentet 2009-11-20.
  5. ^ Akhmanova, M; Dement'ev, B; Markov, M (februar 1978). "Water in the regolith of Mare Crisium (Luna-24)?". Geokhimiya (russisk) (285).
  6. ^ Akhmanova, M; Dement'ev, B; Markov, M (1978). "Possible Water in Luna 24 Regolith from the Sea of Crises". Geochemistry International. 15 (166).

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