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The outer planets are planets in the Solar System that are beyond the asteroid belt. The four planets; Jupiter, Saturn, Uranus and Neptune are gas giants. All four of these planets have planetary rings which are made up of dust and other particles.[1]
Related pages
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Moons of Jupiter - Rings of Jupiter
Moons of Saturn - Rings of Saturn
Moons of Uranus - Rings of Uranus
Moons of Neptune - Rings of Neptune
Inner planet
References
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↑Wolf, Portia. "The Outer Planets". Laboratory For Atmosphere And Space Physics. University of Colorado. Archived from the original on 30 December 2011. Retrieved 2 April 2012.
More reading
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Scott W. Benson – Solar Power for Outer Planets Study (2007) – NASA Glenn Research Center
Trautman and Bethke – Human Outer Planet Exploration (2003) – NASA Langley Research Center and Princeton University Archived 2012-01-19 at the Wayback Machine
Other websites
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Outer Planets Assessment Group (NASA)
October 2011 OPAG Presentations
Planetary Science Decadal Survey Mission & Technology Studies Archived 2017-12-18 at the Wayback Machine
Dwayne Day – Exploration of the Outer Planets – U.S. Centennial of Flight Commission Archived 2011-04-13 at the Wayback Machine ~2003
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