There were some interesting developments involving comet C/2012 S1 (ISON) over the weekend. The View From the Far Side of the Sun Advertisement ISON is being observed by many spacecraft. One of them ...
The Moon follows an elliptical path around the Earth, with an average eccentricity of about 0.055 (a perfect circle has an eccentricity of 0). This means that, at its closest approach, the Moon comes ...
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