1. Scales and Angular Measurement
This illustration shows how you can use your hand to make rough estimates of angular sizes. At arm's length, your little finger is about 1 degree across, your fist is about 10 degrees across, etc. (Credit: NASA/CXC/M.Weiss)
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This illustration shows how you can use your hand to make rough estimates of angular sizes. At arm's length, your little finger is about 1 degree across, your fist is about 10 degrees across, etc. (Credit: NASA/CXC/M.Weiss)
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Revised: August 19, 2008