Astrophysics (index)about

parsec

(pc)
(about 3.26 light-years)

A parsec is the distance corresponding to a parallax of one arcsecond, i.e., if an object shows a parallax of one arcsecond, it is one parsec from the Sun.

Equivalence:

If a star appears to move back and forth two arcseconds over the course of a year as the Earth moves to and from a spot 2 AU away (1 arcsecond parallax angle), the star is 1 parsec distant. If the movement is half that, then the star is twice as distant.


(distance,unit)
http://en.wikipedia.org/wiki/Parsec

Referenced by:
absolute magnitude (M)
astronomical quantities
astronomical unit (AU)
baryon acoustic oscillations (BAO)
Bok globule
distance modulus (u)
DQ Tau
dwarf galaxy
F-type star (F)
filament
final parsec problem
galaxy
GJ 1132 b
GJ 1214 b
Gould's Belt
Kennicutt-Schmidt law
magnitude
molecular cloud
NANOGrav
Nessie
Orion Nebula Cluster (ONC)
Orion Molecular Cloud Complex
parallax
PAWS
Rho Ophiuchi Cloud Complex
Scholz's Star
stellar distance determination
Taurus-Auriga Complex
Taurus Molecular Cloud 1 (TMC-1)
Trapezium Cluster
Wide-field Multi-object Spectrograph (WFMOS)

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