Book Review: Gravity (2nd Ed.) by Nicholas Mee
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*Gravity (2nd Edition)* cover
*Gravity* is a tale as old as time, with its principle, titular character
having quite literally guided the development of o...
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2020/06/20
How to Draw an Ellipse
As part of an online session on Kepler's 1st & 2nd laws I described how to draw an ellipse using two pins, a pencil, and a loop of string. The participants asked for some instructions that they could use after the session, so here they are:
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