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 206,265 …

Dec 3, 2025 · Parsec, unit for expressing astronomical distance that is equal to 3.26 light-years.

Jul 29, 2022 · A parsec is a unit of distance that is often used by astronomers as an alternative to the light-year, just as kilometers can be used as an alternative to miles.

Jan 19, 2024 · Exactly what that distance is, though, is a little harder to define. Well, no, a definition is easy: a parsec is defined as “the distance at which 1 AU subtends an angle of one …

Unfortunately, like the similarly misused ‘light-year’, the parsec is a unit of length, not of time. A parsec is equal to about 3.26 light-years or roughly 31 trillion kilometres (19 trillion miles).

Oct 30, 2025 · The term “parsec” is derived from the words “parallax” and “arcsecond,” and it represents the distance at which an object would have a parallax angle of one arcsecond.

PARSEC definition: a unit of distance equal to that required to cause a heliocentric parallax of one second of an arc, equivalent to 206,265 times the distance from the earth to the sun, or 3.26 …

A parsec is a unit of distance used in astronomy to measure the vast distances between celestial objects, defined as the distance at which one astronomical unit subtends an angle of one …

The meaning of PARSEC is a unit of measure for interstellar space that is equal to 3.26 light-years and is the distance to an object having a parallax of one second as seen from points …

Jan 15, 2025 · A parsec is defined as the distance at which one astronomical unit (AU) subtends an angle of one arcsecond. One AU is the average distance between the Earth and the Sun, …