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 ...
Earth’s orbit around the Sun is not circular, but an ellipse that is slightly elongated with an eccentricity of 0.017. (An eccentricity of 0 is a circle, while the dwarf planet Pluto has a relatively ...
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