“ You might want to look into the idea of Fermi problems (the name isn't a coincidence). (read full comment) ” 

Posted on July 30, 2009 at 10:12 AM EDT

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“ Questions The AU is increasing? Does that mean that the mean distance between the Earth and the Sun is increasing by 15 cm/yr? And how can you... (read full comment) ” 

Posted on July 29, 2009 at 3:13 PM EDT

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