File:Stellarparallax_parsec1.svg · Wikimedia Commons · See Wikimedia Commons
parsec
Also known as pc, parallax of one second, parallax second
unité de longueur astronomique
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
via Wikipedia infobox
Wikidata facts
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Article · Français
Le parsec (/paʁ.sεk/), de symbole pc, est une unité de longueur utilisée en astronomie. Il est défini comme valant exactement 648 000/π unités astronomiques, soit environ 3,26 années-lumière. Le nom parsec est la contraction de « parallaxe-seconde », une expression se rapportant à sa définition historique, désormais obsolète (cf. figure).
Abstract from DBpedia / Wikipedia · CC BY-SA