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Equatorial coordinate system
A
coordinate system
is a system of numbers used to uniquely determine the position of a point. For
two-dimensional
systems, the numbers (
scalars
) are in ordered pairs. More
dimensions
call for more numbers.
For example, (3) is one-dimensional, (1, 4) is two-dimensional, (1, 5, 9) is three-dimensional, (2, 6, 5, 3) is four-dimensional, and (5, 8, 9, 7, 9) is five-dimensional.