Units of measurement
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Radian
Arcsecond
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Radian
The radian is the base unit of angular measurement in the International System of Units (SI). One radian corresponds to an angle where the arc length is equal to the radius of the circle. A full circle contains 2π radians (approximately 6.283 radians).
Arcsecond
An arcsecond is 1/60 of an arcminute or 1/3600 of a degree. It is used in astronomy and precise sciences.