Changes

: A [[planet]] is a large ball shaped [[object ]] in space.

There are 8 [[planetsplanet]] s in [[The Solar System]].*[[Mercury]]*[[Venus]]*[[Earth]]*[[Mars]]*[[Jupiter]]*[[Saturn]]*[[Uranus]]*[[Neptune ]]

===Meaning===A [[planet]] is an [[object]] [[orbit]]s a [[star]] which has enough [[gravity]] to become round and enough [[gravity]] to clear its [[Orbit|orbital]] path of other [[Object|objects]]. ===About Planets===: A [[planet]] is a large ball shaped [[object]] in space.: [[Planet]]s can be [[Rocky Planet|rocky planets]] or [[Gas Giant|gas giants]].There are 8 [[planet]]s in [[The Solar System]].*[[Mercury]]*[[Venus]]*[[Earth]]*[[Mars]]*[[Jupiter]]*[[Saturn]]*[[Uranus]]*[[Neptune]]  ===Examples==={| class="wikitable"|+ The Rocky Planets|-|[[File:Mercury.png|center|150px]]|[[File:Venus.png|center|150px]]|[[File:Earth.png|center|150px]]|[[File:Mars.png|center|150px]]|-| style="height:20px; width:150px; text-align:center;" |[[Mercury]] is the closest [[planet]] to [[The Sun]].| style="height:20px; width:150px; text-align:center;" |[[Venus]] is the second closest [[planet]] to [[The Sun]].| style="height:20px; width:150px; text-align:center;" |[[Earth]] is the third [[planet]] from [[The Sun]] and is the only [[planet]] known to harbour life.| style="height:20px; width:150px; text-align:center;" |[[Mars]] is the fourth [[planet]] from [[The Sun]]. It is very cold but we may send humans to live there soon.|}{| class="wikitable"|+ The Gas Giant Planets|-|[[File:Jupiter.png|center|150px]]|[[File:Saturn.png|center|150px]]|[[File:Uranus.png|center|150px]]|[[File:Neptune.png|center|150px]]|-| style="height:20px; width:150px; text-align:center;" |[[Jupiter]] is the fifth [[planet]] from [[The Sun]] and the largest [[planet]] in [[The Solar System]].| style="height:20px; width:150px; text-align:center;" |[[Saturn]] is the sixth [[planet]] form [[The Sun]] and has a large ring of dust and rocks [[orbit]]ing it.| style="height:20px; width:150px; text-align:center;" |[[Uranus]] is the seventh [[planet]] from [[The Sun]].| style="height:20px; width:150px; text-align:center;" |[[Neptune]] is the eighth [[planet]] from [[The Sun]].|} ==Key Stage 4=====Meaning===A [[planet]] is an [[object]] [[orbit]]s a [[star]] which has enough [[gravity]] to become round and enough [[gravity]] to clear its [[Orbit|orbital]] path of other [[Object|objects]]. ===About Planets===: A [[planet]] is a large [[Sphere|spherical]] [[object]] in [[orbit]]ting a [[star]].: [[Planet]]s can be [[Rocky Planet|rocky planets]] or [[Gas Giant|gas giants]].There are 8 [[planet]]s in [[The Solar System]]:*[[Mercury]]*[[Venus]]*[[Earth]]*[[Mars]]*[[Jupiter]]*[[Saturn]]*[[Uranus]]*[[Neptune]]: There are thousands of [[exoplanet]]s [[orbit]]ting other [[star]]s in our [[galaxy]]. ===Formation of the Planets===: After a [[nebula]] has collapsed to form a [[protostar]] the [[protostar]] is surrounded by a disk of [[gas]] and dust.: [[Gravity]] causes the [[gas]] and dust clumps together to form grains, which then come to together to form [[asteroid]]s.: Over millions of [[year]]s the [[asteroid]]s collide to form bigger and bigger [[asteroid]]s until they are so large that they have enough [[gravity]] to pull their [[matter]] in to a [[sphere|spherical]] shape and become [[Dwarf Planet|dwarf planets]].: Eventually the [[Dwarf Planet|dwarf planets]] may sweep enough [[material]] out of their [[orbit]]al path that they are considered [[planet]]s. ===Examples==={| class="wikitable"|+ The Rocky Planets|-|[[File:Mercury.png|center|150px]]|[[File:Venus.png|center|150px]]|[[File:Earth.png|center|150px]]|[[File:Mars.png|center|150px]]|-| style="height:20px; width:150px; text-align:center;" |[[Mercury]] is the closest [[planet]] to [[The Sun]] and the smallest [[planet]] in [[The Solar System]].| style="height:20px; width:150px; text-align:center;" |[[Venus]] is the second closest [[planet]] to [[The Sun]].| style="height:20px; width:150px; text-align:center;" |[[Earth]] is the third [[planet]] from [[The Sun]] and is the only [[planet]] known to harbour life.| style="height:20px; width:150px; text-align:center;" |[[Mars]] is the fourth [[planet]] from [[The Sun]]. It is very cold but we may send humans to live there soon.|}{| class="wikitable"|+ The Gas Giant Planets|-|[[File:Jupiter.png|center|150px]]|[[File:Saturn.png|center|150px]]|[[File:Uranus.png|center|150px]]|[[File:Neptune.png|center|150px]]|-| style="height:20px; width:150px; text-align:center;" |[[Jupiter]] is the fifth [[planet]] from [[The Sun]] and the largest [[planet]] in [[The Solar System]].| style="height:20px; width:150px; text-align:center;" |[[Saturn]] is the sixth [[planet]] form [[The Sun]] and has a large ring of dust and rocks [[orbit]]ing it.| style="height:20px; width:150px; text-align:center;" |[[Uranus]] is the seventh [[planet]] from [[The Sun]].| style="height:20px; width:150px; text-align:center;" |[[Neptune]] is the eighth [[planet]] from [[The Sun]].|} ===References=======AQA==== :[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac359 ''Planets, page 101, GCSE Physics; The Revision Guide, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Planets, page 320, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Planets, pages 248-9, GCSE Physics, Hodder, AQA '']:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Planets, pages 275-8, GCSE Physics; Student Book, Collins, AQA '']:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Planets; circular orbits, pages 253-5, GCSE Physics, Hodder, AQA '']:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Planets; motion of, pages 258-9, GCSE Physics, Hodder, AQA ''] ====Edexcel==== :[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Planets, page 184, GCSE Physics, CGP, Edexcel '']:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Planets, pages 118, 119, GCSE Physics, Pearson Edexcel ''] ====OCR====:[https://www.amazon.co.uk/gp/product/1782945687/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945687&linkCode=as2&tag=nrjc-21&linkId=9a598e52189317a20311d7a632747bc9 ''Planets, page 97, Gateway GCSE Physics; The Revision Guide, CGP, OCR '']