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That's called astronomical unit, or AU.That's called astronomical unit, or AU.That's called astronomical unit, or AU.That's called astronomical unit, or AU.
An astronomical unit is the distance from the sun to earth.
An Astronomical Unit, or AU is the distance from the sun to the Earth. One Astronomical Unit is 92 955 887.6 miles.
Earth is one astronomical unit away from the sun.
An astronomical unit is the distance from Earth to Sun, about 150,000,000 million km.