1. 03/30/16
The moon has much lower average density than Earth or the other terrestrial planets & almost no core. It’s a lot like Earth’s mantle.
Stevenson, Making the Moon, Physics Today, Nov 2014 1

2. 2

3. The six Apollo landings which took place between 1969 and 1972 provided scientists with huge amounts of lunar data in the form of photography and orbital experiment results, sample collections and surface operations 3

4. Apollo Lunar Surface Experiments Package (ALSEP)4

5. http://www. spacesafetymagazine 5

6. The terrestrial record shows high attenuation,
whereas the lunar seismogram shows intense scattering due to the
fractured regolith and very weak attenuation due to the lack of intergranular water 6

7. 7

8. 03/30/16
Highlands – Anorthosite: intrusive igneous rock characterized by a predominance of plagioclase feldspar
Apollo 16 landing site
4.19 Ga 8 8

9. Largest nearside basin - formed ~ 0.5 Ga before basalt
03/30/16
Mare basalt – 3.3 Ga
Apollo 15 landing site
Mare Imbrium
Largest nearside basin - formed ~ 0.5 Ga before basalt 9 9

10. https://ase.tufts.edu/cosmos/print_images.asp?id=5
03/30/16 10 10

11. Press & Siever 11

12. Stevenson, Making the Moon, Physics Today, Nov 201412