USA, don't forget to set your clock back this weekend.
October 30, 2009
August 25, 2009
Galileo's Telescope-400 years ago today
On this day, exactly 400 years ago (August 25, 1609, to be exact), Galilei Galileo, Italian mathematician, debuted his new invention, the telescope. Galileo's telescope, which was not the first, was made of wood and leather. It magnified eight times, and had a convex main lens. Its concave eyepiece allowed images to be seen right side up, unlike other telescopes of the period.
July 03, 2009
April 22, 2009
March 20, 2009
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