Last updated on April 20, 2014 at 0:02 EDT

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2005-10-31 07:15:00

Halloween is a big night for astronomers. NASA -- According to the National Retail Foundation, the most popular Halloween costume last year was Spiderman. Next was "a princess," followed by witches and vampires, SpongeBob, Barbie and Harry Potter. Sounds about right. But if you read the complete list of top costumes, you'll notice something missing: astronomers. There are no Sagans, no Galileos, not even a Hubble. And that's funny, because Halloween is an astronomical holiday. It has to do...