[[File:SolarSystemModel.jpg|right|thumb|220px|A model of the inner solar system in the [[Astronomy Tower]].]]
[[File:SolarSystemModel.jpg|right|thumb|220px|A model of the inner solar system in the [[Astronomy Tower]].]]
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[[File:SolarSystemModel2.jpg|A big model of the Solar System in the [[Astronomy Room]]]]
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[[File:SolarSystemModel2.jpg|left|thumb|A big model of the Solar System in the [[Astronomy Room]]]]
The '''solar system''' consists of the sun and the [[:Category:Celestial bodies|celestial bodies]] bound in orbit around it by the force of gravity.<ref name="wikipedia">"[http://en.wikipedia.org/wiki/Solar_System Solar System] on Wikipedia</ref> This includes the nine planets ([[Mercury]], [[Venus]], [[Earth]], [[Mars]], [[Jupiter]], [[Saturn]], [[Uranus]], [[Neptune]], and [[Pluto]]), their moons, and various other objects, such as asteroids and comets.<ref name="wikipedia" />
The '''solar system''' consists of the sun and the [[:Category:Celestial bodies|celestial bodies]] bound in orbit around it by the force of gravity.<ref name="wikipedia">"[http://en.wikipedia.org/wiki/Solar_System Solar System] on Wikipedia</ref> This includes the nine planets ([[Mercury]], [[Venus]], [[Earth]], [[Mars]], [[Jupiter]], [[Saturn]], [[Uranus]], [[Neptune]], and [[Pluto]]), their moons, and various other objects, such as asteroids and comets.<ref name="wikipedia" />
In 1995, ProfessorTrelawney showed her fourth-yearDivination class a magical model of the solar system, complete with a "fiery sun" surrounded by the nine planets and their moons, all suspended under a glass dome.[2]