Moon shots stuck 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...

Stromatolites and Earth--sun--moon Dynamics

Vanyo, J.P. and Awramik, S.M., 1985. Stromatolites and Earth--Sun--Moon dynamics. Precambrian Res., 29 : 121--142. Inclination of stromatolite columns, caused by nonvertical direction of averaged incident solar radiation, provides a signal for deducing astronomical and geophysical data at time of stromatolite formation. A sample of Anabaria juvensis (Bitter Springs Formation, central Australia)...

\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...