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Icy Travelers
Comets are cosmic snowballs of frozen gases, rock and dust roughly the size of a small town. When a comet's orbit brings it close to the sun, it heats up and spews dust and gases into a giant glowing head larger than most planets. The dust and gases form a tail that stretches away from the sun for millions of kilometers.

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Hubble's View of Comet ISON
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Night-Shining Clouds
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Comet Halley
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Comet Machholz
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Infographic: What's That Space Rock?
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Sungrazers
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Comet Shoemaker-Levy 9 Approaches Jupiter
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Water in Jupiter's Atmosphere
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Hubble Captures Comet ISON
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Impact Scar
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Comet PANSTARRS and Andromeda Galaxy
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Challenging PANSTARRS
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PANSTARRS Over United Kingdom
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PANSTARRS Over Mt. Wilson
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PANSTARRS Over England (March 2013)
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Comet 2013 A1 Orbit Path
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Previous
    1     2     3     4     5     6     7    
Next
Hubble's View of Comet ISON
   Browse       View Full Size   
Night-Shining Clouds
   Browse       View Full Size   
Comet Halley
   Browse       View Full Size   
Comet Machholz
   Browse       View Full Size   
Infographic: What's That Space Rock?
   Browse       View Full Size   
Sungrazers
   Browse       View Full Size   
Comet Shoemaker-Levy 9 Approaches Jupiter
   Browse       View Full Size   
Water in Jupiter's Atmosphere
   Browse       View Full Size   
Hubble Captures Comet ISON
   Browse       View Full Size   
Impact Scar
   Browse       View Full Size   
Comet PANSTARRS and Andromeda Galaxy
   Browse       View Full Size   
Challenging PANSTARRS
   Browse       View Full Size   
PANSTARRS Over United Kingdom
   Browse       View Full Size   
PANSTARRS Over Mt. Wilson
   Browse       View Full Size   
PANSTARRS Over England (March 2013)
   Browse       View Full Size   
Comet 2013 A1 Orbit Path
   Browse       View Full Size   
Previous
    1     2     3     4     5     6     7    
Next