• Question: Does the moon have an atmosphere?

    Asked by slamdunkeroo to Claire, Kate, Matt, Rob, Sam on 24 Jun 2013.
    • Photo: Sam Geen

      Sam Geen answered on 24 Jun 2013:

      A very very thin one!

      The number of atoms per cubic centimetre are:
      Argon: 40,000
      Helium: 2,000-40,000
      Sodium: 70
      Potassium: 17
      Hydrogen: fewer than 17

      Earth’s atmosphere, by contrast, has one million trillion molecules per cubic centimetre.

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