Difference between revisions of "Orbit"
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: [[Orbit]]s are caused by a [[force]] of attraction between two [[object]]s acting towards their centres. | : [[Orbit]]s are caused by a [[force]] of attraction between two [[object]]s acting towards their centres. | ||
: [[Planet]]s [[orbit]] [[Star]]s due to the [[force]] of [[gravity]]. | : [[Planet]]s [[orbit]] [[Star]]s due to the [[force]] of [[gravity]]. | ||
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: There are two types of [[orbit]] you should know: | : There are two types of [[orbit]] you should know: | ||
:*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. | :*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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|[[File:Orbit1.gif|center|400px]] | |[[File:Orbit1.gif|center|400px]] | ||
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| − | | style="height:20px; width:400px; text-align:center;" |This [[animation]] shows the [[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. | + | | 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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Revision as of 13:11, 12 March 2019
Contents
Key Stage 2
Meaning
An Orbit is the path planet takes around a star and the path a moon takes around a planet.
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| 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 Universal Theory of 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.
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| 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:
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| 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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| 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. |