Outer planet

From top to bottom: Neptune, Uranus, Saturn, and Jupiter to approximate scale and color.

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.

Related pages

• 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

More reading

• 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

• 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