Moon Photo with landing sites marked
Comparing the Earth and the Moon
Question: Mean density of Moon, and the Differences between the Densities of the Earth and Moon
Answer: Mean density of Moon, and the Differences between the Densities of the Earth and Moon
Bombardment History of the Moon
The Capture Hypothesis question
What about the origin of the Moon?
Excellent University College of London webpage
Ratio of abundances of refractory and volatile elements on the Moon and Earth
| Element | RATIO OF ABUNDANCES |
refractory (re) |
| Barium (Ba) | 6.0 |
Re >1300 K |
| Uranium (U) | 5.0 |
Re >1300 K |
| Thorium (Th) | 4.2 |
Re >1300 K |
| Titanium (Ti) | 2.0 |
Re >1300 K |
| Iridium (Ir) | 1.1x10-1 |
Re >1300 K |
| Sulphur (S) | 4.4 |
Vo 1300-600 K |
| Gallium (Ga) | 3.0x10-1 |
Vo 1300-600 K |
| Copper (Cu) | 1.1x10-1 |
Vo 1300-600 K |
| Sodium (Na) | 8.0x10-2 |
Vo 1300-600 K |
| Germanium (Ge) | 6.9x10-2 |
Vo 1300-600 K |
| Potassium (K) | 6.5x10-2 |
Vo 1300-600 K |
| Rubidium (Rb) | 3.5x10-2 |
Vo 1300-600 K |
| Zinc (Zn) | 8.5x10-3 |
Vo 1300-600 K |
| Bismuth (Bi) | 11.5x10-3 |
Vo <600 K |
| Lead (Pb) | 9.0x10-2 |
Vo <600 K |
| Indium (In) | 3.8x10-2 |
Vo <600 K |
