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FIRST ONSITE EVIDENCE OF WATER ON MOON SURFACE BY CHANG'E 5

Journal Science Advances:

  • The same study was published on 11 January 2022 in a peer-reviewed journal Science Advances.

Key Findings:

  • The study found that lunar soil contains less than 120-per-million (ppm) or 120 grams of water per ton at the landing site.
  • It also contains a light, vesicular rock carrying -180 ppm, much drier than Earth.
  • The lander has noticed signs of water in rocks and soil.
  • Since the water molecule absorbs at a frequency of about three micrometres, it can estimate the water content.
  • Solar wind contributed to the humidity of lunar soil as it brought hydrogen that makes up the water.
  • The additional 60 ppm water in the rock can come from the moon's inner surface.
  • Research has shown that the moon is very dry during certain periods, probably because of degassing of its mantle reservoir.

Chang'e 5:

  • It is the fifth lunar exploration mission of the Chinese Lunar Exploration Program.
  • It is also China's first lunar sample-return mission.

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