_______ ಉದ್ದದ ಒಂದು ಏಕಮಾನ, ಸರಿಸುಮಾರು ಭೂಮಿಯಿಂದ ಸೂರ್ಯನಿಗೆ ಇರುವ ದೂರ.

The astronomical unit (AU) is a unit of length equal to about 149.6 million km, roughly the average distance from the Earth to the Sun. It is used to measure distances within the Solar System.