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*[[Uranus]]
*[[Neptune]]
====Geocentric Model====
: 1900 years ago an [[astronomer]] named [[Ptolemy]] made careful [[observation]]s of the 5 known [[planet]]s and all the [[Star]]s in the night's sky.
: [[Ptolemy]] used these [[observation]]s to claim that the [[Earth]] was at the centre of the [[Universe]] and [[The Solar System]] and that everything in the [[Universe]] [[orbit]]s the [[Earth]].
: This was known as the [[Geocentric Model]] of [[The Solar System]].
: Many people believed [[Ptolemy]] because it fit well with their religious beliefs that a [[god]] created the [[Earth]] before the [[Sun]], [[star]]s and [[planet]]s.
====Heliocentric Model====
: 400 years ago an [[astronomer]] named [[Galileo]] made [[observation]]s of the [[planet]] [[Jupiter]] using a new invention called a [[telescope]].
: [[Galileo]] noticed in the [[observation]]s that there were 4 [[moon]]s that seemed to [[orbit]] [[Jupiter]] which proved [[Ptolemy]]'s [[Geocentric Model]] of [[The Solar System]] was not true because not everything [[orbit]]ted the [[Earth]].
: [[Galileo]] then went on to claim that the [[Earth]] was not the centre of [[The Solar System]] but the [[Sun]] was the centre and the [[planet]]s [[orbit]]ted the [[Sun]].
: This was called the [[Heliocentric Model]] of [[The Solar System]].
: Unfortunately many religious people did not like this idea and [[Galileo]] was put under house arrest for [[heresy]] until he died several years later.
==Key Stage 3==