Composition = rocky
(silicates - anorthosite and basalt)
Density = 3.34 g/cm3
Temperature = -280 F (on dark side) to 260 F (in sunlight)
Average is -10 F
Temperature is approximately 0 F in the shade ont he sunny side
Moon's gravitational pull causes the tides
Also slows Earth's rotation (1.5 seconds in 100,000 years)
The result? 4.6 billion years ago, a day was only 5 hours long
Moon is slowly spiraling away from Earth at 3-4 cm/yr
Composed of basalt
3.2 - 3.8 billion years old