The moon

Some basic facts:

• radius = 1738 km ~ 2000 km
  • compare to earth radius ~ 6000 km
  • 
• orbit semimajor axis = 3.84 x 10⁵ km
  • So a ~ 60 R_E
  • 
• orbit period: 1 month
• rotation period is the same: Man in the Moon always faces us.
• density ~ 3300 kg/m³
  • compare to earth density ~ 5500 km

What about the Moon's atmosphere?

What do you suppose it is like inside?

What is the surface like?

What history does this suggest?

What are tidal forces ?

What do the tidal forces do ?

Where did the Moon come from?

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