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==Key Stage 2==
 
==Key Stage 2==
 
===Meaning===
 
===Meaning===
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An [[Orbit]] is the path an [[asteroid]], [[comet]], [[planet]] or [[dwarf planet]] takes around a [[star]] and the path a [[moon]] takes around a [[planet]].
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An [[Orbit]] is the path [[planet]] takes around a [[star]] and the path a [[moon]] takes around a [[planet]].
 
{| class="wikitable"
 
{| class="wikitable"
 
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|A [[Planet]] [[orbit]]ing a [[Star]].
 
|A [[Planet]] [[orbit]]ing a [[Star]].
 
|}
 
|}
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===About Orbits===
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: An [[orbit]] is a roughly circular path, but can be stretched out into an oval shape.
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: [[The Moon]] [[orbit]]s the [[Earth]]. This means [[The Moon]] takes a circular path around the [[Earth]].
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: All the [[planet]]s orbit [[The Sun]]. This means the [[planet]]s take a circular path around [[The Sun]].
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==Key Stage 3==
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===Meaning===
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An [[Orbit]] is the path an [[asteroid]], [[comet]], [[planet]] or [[Dwarf Planet|dwarf planet]] takes around a [[star]] and the path a [[moon]] takes around a [[planet]].
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===About Orbits===
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: [[Moon]]s [[orbit]] [[planet]]s and [[planet]]s [[orbit]] the [[stars]] due to [[gravity]].
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: [[Isaac Newton|Newton]] was the first person to realise that [[object]]s were held in [[orbit]] by [[gravity]] which he [[explain]]ed in his [[Newton's Law of Universal Gravitation|Law of Universal Gravitation]].
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: [[Gravity]] is a constant [[force]] directed to the centre of a [[massive]] [[object]].
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: [[The Moon]] feels a [[force]] pulling it towards the centre of the [[Earth]]. The [[Earth]] feels a [[force]] equal in [[magnitude]] but opposite in direction to that of [[The Moon]].
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{| class="wikitable"
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|-
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|[[File:Orbit1.gif|center|400px]]
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|-
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| style="height:20px; width:400px; text-align:center;" |The [[planet]]s are pulled towards [[The Sun]] by [[gravity]].
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|}
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==Key Stage 4==
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===Meaning===
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An [[orbit]] is the circular or [[ellipse|elliptical]] path that an [[object]] takes a more [[mass|massive]] [[object]] due to a [[force]] of attraction acting between them.
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===About Orbits===
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: [[Orbit]]s are caused by a [[force]] of attraction between two [[object]]s acting towards their centres.
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: [[Planet]]s [[orbit]] [[Star]]s due to the [[force]] of [[gravity]].
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''Higher''
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: There are two types of [[orbit]] you should know:
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:*Circular [[orbit]] - An [[orbit]] where the distance between the two [[object]]s (the radius) remains constant. In this [[orbit]] the [[speed]] of the [[orbit]]ting [[object]] is constant. However, the [[velocity]] of the [[orbit]]ting [[object]] is constantly changing due to the changing direction.
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{| class="wikitable"
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|-
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|[[File:CircularMotion.gif|center|]]
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|-
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| style="height:20px; width:200px; text-align:center;" |This animation shows [[acceleration]] due to the changing direction of a circular [[orbit]] of the blue [[object]] around the red [[object]]. A circular [[orbit]] is one of constant radius.
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|}
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:*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]].
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{| class="wikitable"
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|-
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|[[File:Orbit1.gif|center|400px]]
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|-
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| style="height:20px; width:400px; text-align:center;" |This animation shows the elliptical [[orbit]] of a [[planet]] around a [[Star]]. 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.
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|}
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===References===
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====AQA====
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:[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 ''Orbit, pages 276, 278-9, GCSE Physics; Student Book, Collins, AQA '']
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:[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=f0dfb66dafcb0c6e9449e7b1a4ae1ac350 ''Orbits, page 101, GCSE Physics; The Revision Guide, CGP, AQA '']
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:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Orbits, pages 236-237, GCSE Physics; Third Edition, Oxford University Press, AQA '']
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:[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 ''Orbits, pages 249-50, GCSE Physics, Hodder, AQA '']
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:[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 ''Orbits, pages 320, 321, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
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:[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 ''Orbits; circular, pages 253-5, GCSE Physics, Hodder, AQA '']
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:[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 ''Orbits; speed of, pages 254-5, GCSE Physics, Hodder, AQA '']
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====Edexcel====
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:[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Orbits, page 59, GCSE Physics; The Revision Guide, CGP, Edexcel '']
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:[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 ''Orbits, pages 118, 120-121, GCSE Physics, Pearson Edexcel '']
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:[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 ''Orbits, pages 184-186, GCSE Physics, CGP, Edexcel '']
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====OCR====
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:[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 ''Orbits, page 97, Gateway GCSE Physics; The Revision Guide, CGP, OCR  '']
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:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Orbits, pages 240-241, Gateway GCSE Physics, Oxford, OCR '']

Latest revision as of 07:55, 15 December 2019

Key Stage 2

Meaning

An Orbit is the path planet takes around a star and the path a moon takes around a planet.

Orbit1.gif
A Planet orbiting a Star.

About Orbits

An orbit is a roughly circular path, but can be stretched out into an oval shape.
The Moon orbits the Earth. This means The Moon takes a circular path around the Earth.
All the planets orbit The Sun. This means the planets take a circular path around The Sun.

Key Stage 3

Meaning

An Orbit is the path an asteroid, comet, planet or dwarf planet takes around a star and the path a moon takes around a planet.

About Orbits

Moons orbit planets and planets orbit the stars due to gravity.
Newton was the first person to realise that objects were held in orbit by gravity which he explained in his Law of Universal Gravitation.
Gravity is a constant force directed to the centre of a massive object.
The Moon feels a force pulling it towards the centre of the Earth. The Earth feels a force equal in magnitude but opposite in direction to that of The Moon.
Orbit1.gif
The planets are pulled towards The Sun by gravity.

Key Stage 4

Meaning

An orbit is the circular or elliptical path that an object takes a more massive object due to a force of attraction acting between them.

About Orbits

Orbits are caused by a force of attraction between two objects acting towards their centres.
Planets orbit Stars due to the force of gravity.

Higher

There are two types of orbit you should know:
CircularMotion.gif
This animation shows acceleration due to the changing direction of a circular orbit of the blue object around the red object. A circular orbit is one of constant radius.
Orbit1.gif
This animation shows the elliptical orbit of a planet around a Star. 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.

References

AQA

Orbit, pages 276, 278-9, GCSE Physics; Student Book, Collins, AQA
Orbits, page 101, GCSE Physics; The Revision Guide, CGP, AQA
Orbits, pages 236-237, GCSE Physics; Third Edition, Oxford University Press, AQA
Orbits, pages 249-50, GCSE Physics, Hodder, AQA
Orbits, pages 320, 321, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Orbits; circular, pages 253-5, GCSE Physics, Hodder, AQA
Orbits; speed of, pages 254-5, GCSE Physics, Hodder, AQA

Edexcel

Orbits, page 59, GCSE Physics; The Revision Guide, CGP, Edexcel
Orbits, pages 118, 120-121, GCSE Physics, Pearson Edexcel
Orbits, pages 184-186, GCSE Physics, CGP, Edexcel

OCR

Orbits, page 97, Gateway GCSE Physics; The Revision Guide, CGP, OCR
Orbits, pages 240-241, Gateway GCSE Physics, Oxford, OCR
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