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What an orbit is and what factors affect the size speed and time period of an orbit?
Wiki User
∙ 9y ago
An orbit is the path followed by a planet according to Kepler's laws, which are very accurate but not exact. Size, speed and period are all related by simple formulas so that if you know one you can find out the other two.
The orbit is an ellipse and the size is usually measured by its mean radius, also called its semi-major axis, which is the average of the maximum and minimum distances. For the Earth that is 149.6 million kilometres.
The orbital period is proportional to the mean radius to the power 1.5, while the orbital speed is inversely proportional to the square root of the mean radius.
Wiki User
∙ 9y ago
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Does the weight of space junk affect its orbital speed?
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How does the suns gravitational pull affect the speed at which planets orbit?
When the pull is stronger, they move quicker.
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