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Last updated on April 24, 2014 at 11:03 EDT
Hartley 2 Close Up

Hartley 2, Close Up

This image from the High-Resolution Instrument on NASA's EPOXI mission spacecraft shows part of the nucleus of comet Hartley 2. The sun is illuminating the nucleus from the right. A distinct cloud of individual particles...
Word of the Day
logogriph
  • A riddle; specifically, a riddle formed by the arbitrary or confused mingling of parts or elements, which have to be recombined in proper order for the answer.
This word comes from the Greek 'logos,' word, plus 'griphos,' fishing basket, riddle.
Quote of the Day
A probability is a desperate attempt of chaos to become stable.

- unknown
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