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Comet Bops Past Neptune Cleanly

2 May 2011, 15:14 UTC
Comet Bops Past Neptune Cleanly
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If the solar system were a Peanuts cartoon, the role of Pigpen would be played by a comet. Comets are messy creatures: they surround themselves in a cloud of gas and dust and often carry a long tail of debris. [More]

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