Question

One parsec is defined as



Radius of that circle whose arc of 1 A.U subtends and angle of one sec at the centre of circle

Arc of that circle whose radius of 1 A.U subtends an angle of 1 sec at the centre of circle

Arc of that circle whose radius of 1 A.U subtends an angle of 1 degree at the centre of circle

Radius of that circle whose arc of 1 A.U subtends an angle of one degree at the centre of circle

​

Answer 1

Answer:

Bottom line: One parsec is defined as the distance to a star that shifts by one arcsecond from one side of Earth's orbit to the other. One parsec is about 30 trillion kilometers, or just over three light-years.