‘Parsec’ is the unit of-

A parsec is a unit of length used to measure vast astronomical distances. It is defined as the distance at which one astronomical unit (the average Earth-Sun distance) subtends an angle of one arcsecond. Essentially, it is the distance from which the orbit of Earth would appear as a tiny angle of one second of arc.

In terms of numerical value, one parsec is approximately equal to 3.26 light-years, which translates to about 3.08 × 10¹⁶ meters. To put it in perspective, this means a parsec is used to express immense scales far beyond the capabilities of standard terrestrial measurements. The parsec is a key concept in astronomy, enabling scientists to communicate interstellar and intergalactic distances with greater precision.

Thus, the parsec is a unit of length that helps astronomers understand and describe the cosmos more effectively.