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→Key Stage 4
:*Elliptical [[orbit]] - An [[orbit]] where the distance between the two [[object]]s changes. In this [[orbit]] the [[speed]] of the [[orbit]]ting [[object]] changes with the distance between the [[object]]s. The greater the distance the smaller the [[speed]].
{| class="wikitable"
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|[[File:Orbit1.gif|center|400px]]
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| style="height:20px; width:400px; text-align:center;" |As the [[planet]] gets further from the [[Star]] the [[speed]] of the [[planet]] decreases. As the [[planet]] gets closer to the [[Star]] the [[speed]] of the [[planet]] increases.
|}