The astronomical unit (symbol au) is a distance unit used in astronomy corresponding to the average radius of the Earth orbit around the Sun. It’s a unit very used to express the distances in the interior of a solar system.
One astronomical unit is approximately equal to 150 millions of kilometre (1.5×108 km).
Matching words : Light year, Parsec
Examples :
- In Star Trek: The Motion Picture, the Vejur entity’s diameter measures several ua
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