Transcription of OURSOLARSYSTEM
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National Aeronautics and Space AdministrationNational Aeronautics and Space solar SystemOur Star The SunMercuryVenusEarthEarth s MoonMarsAsteroidsMeteors and Meteorites Moons of the solar SystemJupiterGalilean Moons of JupiterSaturnMoons of SaturnUranusNeptunePluto and CharonCometsKuiper Belt and Oort CloudWhat Is a Planet?Educational ProductEducatorsGrades K 12+LS-2013-07-003-HQ JPL 400-1489 07/13 NASA EDUCATIONAL RESOURCESThe NASA portal ( ) is the gateway for information about content, programs, and services offered for the general public and the education community.
solar wind is abruptly slowed by pressure from gas between the stars is called the termination shock. Two NASA spacecraft, launched in 1977, have crossed the termi-nation shock — Voyager 1 in 2004 and Voyager 2 in 2007. In late 2011, Voyager 1 data showed that the spacecraft had entered the outermost region of the heliosphere.
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