Exploring the Moon on Earth

Ringel’s Generalized Earth-moon Problem

A graph G has surface thickness n (S-thickness n) with respect to the surface S, if G can be decomposed into n and no fewer subgraphs by making n copies of the vertex set of G and then assigning each edge of G to one of the n copies so that n graphs result; each resulting subgraph of G must be S embeddable. The chromatic number of a graph G, denoted χ(G), is simply the fewest number of colors n...

Zircon from the Moon , Earth and Mars

Dynamical evolution of the Earth-Moon Progenitors

The origin of Earth's Moon has been a perplexing mystery for many decades. Lunar samples have been obtained indicating an age of the Moon to be roughly 60-120 Myr [1,2] younger than the Calcium Aluminum Inclusions in the chondritic meteorites. Updated measurements indicate an age difference of 70-110 Myr [3,4]. Additional information has been obtained for the composition of the Moon relative to...

The Oldest Earth and Moon Rocks

Introduction: We describe a project that could greatly alter our understanding of the environment on Earth at the time in which life originated. The approach is to systematically search for terrestrial rock and mineral samples that should be present on the lunar surface due to impacts, and in selected terrestrial localities. Project activities include studies of terrestrial materials, developme...

\Hydrous-Carbonaceous" Micrometeorites on the Early Earth, Moon and Mars

Unmelted large micrometeorites with sizes of about 50-500 m were recovered from the Antarctica and Greenland ice sheets. Their capture in such \space collectors" made of very clean ices, where they got both shielded from most terrestrial contaminants and preserved by deep freeze, allowed for the rst time the investigation of their carbon chemistry. Mass ux measurements in both ice sheets indica...