Convert ligne (Paris line) to astronomical unit
Selected category: length.
Definition and details for ligne (Paris line):
Paris line is a traditional unit of length equal to 1/12 of a Paris inch (pouce du Roi) or about 2.256 mm. Ligne is still used by French and Swiss wristwatch makers to measure the size of a watch movement.
Definition and details for astronomical unit:
Astronomers use astronomical unit (ua or au or AU) as yardstick for measuring the distances between objects in the Solar System. AU is defined as the distance from the center of the Earth to the center of the Sun. Currently it is accepted that this length is 149 597 870 691 meters, with an uncertainty of about 30 meters.