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parsec
par·sec P0083400 (pär′sĕk′)n. A unit of astronomical length based on the distance from Earth at which stellar parallax is one second of arc and equal to 3.258 light-years, 3.086 × 1013 kilometers, or 1.918 × 1013 miles.
[par(allax) + sec(ond).]parsec (ˈpɑːˌsɛk) n (Units) a unit of astronomical distance equal to the distance from earth at which stellar parallax would be 1 second of arc; equivalent to 3.0857 × 1016 m or 3.262 light years[C20: from parallax + second2]par•sec (ˈpɑrˌsɛk)
n. a unit of distance equal to 206,265 times the distance from the earth to the sun, or 3.26 light years. [1910–15; par (allax) + sec (ond)2] par·sec (pär′sĕk′) A unit of astronomical length equal to 3.26 light-years. It is based on the distance from Earth at which a star would have a parallax of one second of arc.parsec1. (pc) The distance at which 1 au would measure 1 sec of arc, equal to 19.16 trillion mi (30.857 trillion km) or 206,265 au or 3.26 ly (1).2. (pc) A unit of length used for measuring astronomical distances. 1 parsec = 3.26 light years.Thesaurus| Noun | 1. | parsec - a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light yearssecparastronomy unit - a linear unit used for astronomical distances |
Translations
parsec
parsec (pär`sĕc) [parallax + second], in astronomy, basic unit of length for measuring interstellar and intergalactic distances, equal to 206,265 times the distance from the earth to the sun, 3.26 light-years, or 3.08 × 1013 km (about 19 million million mi). The distance in parsecs of an object from the earth is the reciprocal of the parallaxparallax
, any alteration in the relative apparent positions of objects produced by a shift in the position of the observer. In astronomy the term is used for several techniques for determining distance.
..... Click the link for more information. of the object. The nearest star, Proxima Centauri, has a parallax of 0.763" of arc and a distance of about 1.31 parsecs.parsec (par -sek) Short for parallax second. Symbol: pc. A unit of length normally used for distances beyond the Solar System. It is the distance at which the semimajor axis of the Earth's orbit subtends an angle of one arc second. It is thus the distance at which a star would have an annual parallax of one arc second. A star with a parallax of p arc seconds is at a distance of d parsecs, given by d = 1/p (accurate up to distances of about 30 pc). One parsec equals 30.857 × 1012 km, 206 265 astronomical units, and 3.2616 light-years.Parsec a unit of distance in astronomy equal to 206,265 astronomical units, or 30,857 X 1012 km; its international abbreviation is pc. Distance expressed in parsecs is the reciprocal of the annual parallax. Thus, a distance of 10 pc corresponds to a parallax of 0.1”. In fact, the name “parsec” derives from these last two values—”parallax of one second.” One parsec is equal to 3.26 light-years. parsec[′pär‚sek] (astronomy) The distance at which a star would have a parallax equal to 1 second of arc; 1 parsec equals 3.258 light-years or 3.08572 × 1013 kilometers. Derived from parallax-second. parsec a unit of astronomical distance equal to the distance from earth at which stellar parallax would be 1 second of arc; equivalent to 3.0857 × 1016 m or 3.262 light years PARSECExtensible language with PL/I-like syntax, derived fromPROTEUS. "PARSEC User's Manual", Bolt Beranek & Newman (Dec1972).PARSEC
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| PARSEC➣Parallax Second (unit of astronomical distance; 3.258 light-years) | | PARSEC➣Parallel Simulation Environment for Complex Systems | | PARSEC➣Preliminary Analysis of Revolutionary Space Exploration Concepts (US NASA) | | PARSEC➣Pittsburgh Area Realtime Scientifiction Enthusiasts Club (Pittsburgh, PA) | | PARSEC➣Pathology Accessioning and Retrieval System with Encoding by Computer (computer application) |
parsec
Synonyms for parsecnoun a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arcSynonymsRelated Words |