A surprising (and eclectic) number of scientists, mathematicians, and astronomers have some form of measurement named after them. We found close to 100 names; no doubt there are more. For this Quality Digest Daily contest, you must match the names of all 20 of these measurement celebs to the definition of their particular unit of measure. When you’re done, e-mail us your sorted list. We’ll pick a winner by drawing a name from among the successful contestants. The winner will receive a $50 gift card. The contest ends Fri., July 29, 2011.

Good luck!

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