Saturday, June 26, 2010

Astronomy 101 in the Neighborhood

By the shadow cast on the wall, you can tell we shot this photo at a bit after 11:00 AM. Sundials are the oldest known instruments for keeping track of time. A sundial needs two things: a set of markings that indicate the time, and something to cast a shadow onto those markings. See below for how you can create your own sundial.

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