Question

what is the distance pc called?​

Answer 1

Answer:

The parsec (symbol: pc) is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,000 astronomical units (au), i.e. 30.9 trillion kilometres (19.2 trillion miles).

Answer 2

Answer:

P - Pole

C- Centre of curvature

The distance between the pole and the centre of curvature is known as distance pc.