Polar coordinate system
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In mathematics, the polar coordinate system specifies a given point in a plane by using a distance and an angle as its two coordinates. These are
Hipparchus, Greek astronomer
A planimeter, which mechanically computes polar integrals
Archimedean spiral
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The Archimedean spiral is a spiral named after the 3rd-century BC Greek mathematician Archimedes. The term Archimedean spiral is sometimes used to refer to the more general class of spirals of this ty
Polar coordinate system
…and there are references to his using polar coordinates in establishing stellar positions. In On Spirals, Greek mathematician Archimedes describes his spiral, a function whose radius depends on the angle. The Greek work, however, did not extend to a full coordinate system. From the 8th century AD onward…
Atacama Large Millimeter Array image of LL Pegasi