Atmospher1 - Atmosphere Magnetic field around Europa. The...

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Atmosphere Magnetic field around Europa. The red line shows a trajectory of the Galileo spacecraft during a typical flyby (E4 or E14). Observations with the Goddard High Resolution Spectrograph of the Hubble Space Telescope , first described in 1995, revealed that Europa has a tenuous atmosphere composed mostly of molecular oxygen (O 2 ). [55] [56] The surface pressure of Europa's atmosphere is 0.1 μPa , or 10 −12 times that of the Earth. [10] In 1997, the Galileo spacecraft confirmed the presence of a tenuous ionosphere (an upper-atmospheric layer of charged particles) around Europa created by solar radiation and energetic particles from Jupiter's magnetosphere , [57] [58] providing evidence of an atmosphere. Unlike the oxygen in Earth's atmosphere , Europa's is not of biological origin. The surface- bounded atmosphere forms through radiolysis , the dissociation of molecules through radiation. [59]
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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Atmospher1 - Atmosphere Magnetic field around Europa. The...

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