Physical Study of Planets and Satellites (L’étude Physique des Planètes et des Satellites)

The Commission sponsored the Joint Discussion with Commissions 15, 17, 21, 22 and 35 on the Origin of the Earth and Planets, which took place on 21 August. A joint meeting, sponsored by Commission 40, and including also Comissions 16 and 17, was held on 24 August.