The astronomical unit is a length scale used for Solar System distances, approximately . Coarse estimates sometimes round it to . Numerical coefficients in planet formation estimates depend on which approximation is used.
An astronomical unit (AU) is a standard unit of measurement used in astronomy to describe distances within our solar system. It is defined as the average distance between the Earth and the Sun. The exact value of 1 astronomical unit is approximately: - 149,597,870.7 kilometers (about 92,955,807.
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