پارسک

Also known as pc, parallax of one second, parallax second

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AI overview

A parsec is a unit of distance used by astronomers to measure how far away stars and galaxies are from Earth, roughly equal to 3.26 light-years. It's defined using the angle that Earth's orbit makes as seen from distant stars, which allows astronomers to calculate cosmic distances using geometry and observations from different positions in Earth's orbit around the Sun.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Unit.name: parsec
Unit.image: Stellarparallax parsec1.svgclass=skin-invert-image
Unit.caption: A parsec is the distance from the Sun to an astronomical object that has a parallax angle of one arcsecond (not to scale)
Unit.standard: astronomical units
Unit.quantity: length/distance
Unit.symbol: pc
Unit.units1: metric (SI) units
Unit.inunits1: ≈ 
Unit.units2: imperial  US units
Unit.units3: astronomical units