3.  high gravity low 

4. Seismic Velocities Lunar________________Seismic Velocity (km/sec) Basalt 10017.....................1.84 Basalt 10046.....................1.25 Near surface layer..............1.2 Terrestrial rocks_______Seismic Velocity (km/sec) Granite...............................5.9 Gneiss................................4.9 Basalt.................................5.8 Sandstone...........................4.9 Marble................................6.02 Limestone...........................5.06-5.97 Cheese_______________Seismic Velocity (km/sec) Sapsego (Swiss).................2.12 Romano (Italy)....................1.74 Cheddar (Vermont).............1.72 Muenster (Wisconsin)..........1.57

5. Sizes and densities of planets diam. dens. “uncompressed” moment of (km) (g/cc) density inertia Mercury 2440 5.45.3.33 Venus 6040 5.24.3.33 Earth 6400 5.54.4.33 (Moon) 1740 3.33.3.393 Mars 3400 3.93.7.366 Jupiter71500 1.3.254 Saturn60300 0.7 (!).210 Uranus25600 1.3.23 Neptune24800 1.6.23

10. Martian topography