An extremely important question is that of how the Moon was formed and came to have its present orbit around the Earth.
Five Serious Theories
Five serious theories have been proposed for the formation of the Moon (not counting the one involving .
Water on an extrasolar planet
11 July 2007 Scientists report the first conclusive discovery of the presence of water vapour in the atmosphere of a planet beyond our Solar System. The discovery was made by analysing the transit of the gas .