What unit of length is defined as the mean distance between the earth and the sun (approximately 149,597,871 km)?
what unit of length is defined as the mean distance between the earth and the sun (approximately 149,597,871 km)
FreebaseQA-train-12763.P0
mean distance
semi-major axis
m.03ywhs3
type.property.unit
m.0n0_
astronomical unit