text: Cassini discovers Saturn moon atmosphere
  
  March 19, 2005 
  
  NASA's Saturn exploration spacecraft, Cassini, has discovered an atmosphere about the moon Enceladus. This is the first such discovery by Cassini, other than Titan, of the presence of an atmosphere around a Saturn moon. 
  Enceladus's gravity is too weak to hold an atmosphere around the planet, leading scientists to believe that volcanism, geysers, or gases escaping from the surface or the interior as a continuous source for the atmosphere. 
  The atmosphere was detected using a magnetometer during two close flybys of Enceladus on February 17 and March 9. The magnetometer is used to measure the magnitude and direction of magnetic fields surrounding Saturn and its moons. The magnetometer detected a bending of Saturn's magnetic field around the moon, indicating the Saturnian plasma is being diverted away from an extended atmosphere. The observations from the Enceladus flybys are believed to be due to ionized water vapor.
tokens: Cassini discovers Saturn moon atmosphere March 19 , 2005 NASA 's Saturn exploration spacecraft , Cassini , has discovered an atmosphere about the moon Enceladus . This is the first such discovery by Cassini , other than Titan , of the presence of an atmosphere around a Saturn moon . Enceladus 's gravity is too weak to hold an atmosphere around the planet , leading scientists to believe that volcanism , geysers , or gases escaping from the surface or the interior as a continuous source for the atmosphere . The atmosphere was detected using a magnetometer during two close flybys of Enceladus on February 17 and March 9 . The magnetometer is used to measure the magnitude and direction of magnetic fields surrounding Saturn and its moons . The magnetometer detected a bending of Saturn 's magnetic field around the moon , indicating the Saturnian plasma is being diverted away from an extended atmosphere . The observations from the Enceladus flybys are believed to be due to ionized water vapor .
nps.text: Cassini discovers
nps.id: np0
nps.text: Saturn moon atmosphere
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nps.text: NASA's Saturn exploration spacecraft
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nps.text: Cassini
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nps.text: an atmosphere
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nps.text: the moon Enceladus
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nps.text: the first such discovery
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nps.text: Cassini
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nps.text: Titan
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nps.text: the presence
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nps.text: an atmosphere
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nps.text: a Saturn moon
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nps.text: Enceladus's gravity
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nps.text: an atmosphere
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nps.text: the planet
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nps.text: leading scientists
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nps.text: volcanism
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nps.text: geysers
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nps.text: gases
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nps.text: the surface
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nps.text: the interior
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nps.text: a continuous source
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nps.text: the atmosphere
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nps.text: The atmosphere
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nps.text: a magnetometer
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nps.text: two close flybys
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nps.text: Enceladus
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nps.text: February 17 and March 9
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nps.text: The magnetometer
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nps.text: the magnitude
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nps.text: direction
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nps.text: magnetic fields
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nps.text: Saturn
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nps.text: its moons
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nps.text: The magnetometer
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nps.text: a bending
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nps.text: Saturn's magnetic field
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nps.text: the moon
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nps.text: the Saturnian plasma
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nps.text: an extended atmosphere
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nps.text: The observations
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nps.text: the Enceladus flybys
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nps.text: ionized water vapor
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