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Last updated on April 17, 2014 at 1:21 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
flittermouse
  • A bat; a reremouse; a flindermouse.
This word is in imitation of the German 'fledermaus.' 'Die Fledermaus' ('The Bat') is an operatta composed by Johann Strauss II.
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Quote of the Day
Science is the knowledge of consequences, and dependence of one fact upon another.

- Thomas Hobbes (1588 - 1679)
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