At PSI we have worked with several leading researchers to propose new work or the accretion mechanics using a variant of the PSI planet building model. But this work has not been funded. The Moon Today. This late afternoon scene on the moon typifies the moon as it has been for about 3 billion years. Volcanism has ended.
Meteorite impacts are rare.
The quiet landscape awaits the return of human explorers. Hartmann, W. K. 1997. A Brief History of the Moon. The Planetary Report . Hartmann, W. K. and Ron Miller 1991.