Eight planets have been discovered in our solar system. Mercury, Venus, Earth, and Mars are the planets closest to the Sun. They are called the inner planets. The inner planets are made up mostly of rock. The outer planets are Jupiter, Saturn, Uranus, and Neptune.
starchild.gsfc.nasa.gov/docs/StarChild/solar_system_lev... starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/planets.html
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Learn about the outer planets of our solar system: Jupiter, Saturn, Uranus, Neptune, and Pluto. ... There is a very great distance between the inner and outer planets. This region is called the Asteroid Belt and large chunks of rock swarm around and around in it.
www2.scholastic.com/browse/article.jsp?id=4854
This model of the outer solar system includes Jupiter, Saturn, Uranus, and Neptune. ... Applet by Heather Welch ... The Outer Solar System...
galileoandeinstein.physics.virginia.edu/more_stuff/flas... galileoandeinstein.physics.virginia.edu/more_stuff/flashlets/outerplanets.htm
Solar System - Wikipedia, the free encyclopedia
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The Solar System consists of the Sun and those celestial objects bound to it by gravity, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago....
en.wikipedia.org/wiki/Solar_System
Projects written and illustrated by Elementary West Second Grade Students ... Go to the Inner Planets ... ; Find out about the Outer Planets...
www.siec.k12.in.us/west/proj/space/solar2.htm
1973; Pioneer 10 flies past Jupiter, becoming the first spacecraft to visit any outer plane ... Outer Planets: Realm of the Giants ... Explorations; Explorations of the outer planets.
stardate.org/resources/ssguide/outer_planets.html stardate.org/resources/ssguide/outer_planets.html
The satellites of the giant outer planets are a surprisingly diverse group of bodies. Most are composed of mixtures of water and other ices, including most likely ammonia ice, and rocky material.
www.lpi.usra.edu/resources/outerp/moons.html www.lpi.usra.edu/resources/outerp/moons.html
Bagenal is chair of the Outer Planets Assessment Group (OPAG), which was established by NASA in late 2004 to identify scientific priorities and pathways for exploration in the outer solar system. ... Plutonium Shortage May Thwart Future NASA Missions to Outer Planets...
www.space.com/scienceastronomy/080415-st-nasa-esa-outer... www.space.com/scienceastronomy/080415-st-nasa-esa-outer-planets.html
Leading space scientists gathered here to attend a June 9-10 meeting of NASA's Outer Planets Assessment Group (OPAG), planning, prioritizing, and advocating a new exploration agenda for the distant planets.
www.space.com/scienceastronomy/050614_outer_planets.htm... www.space.com/scienceastronomy/050614_outer_planets.html
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