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parsec
(pc)
subjectfact 
parsechas symbol pchas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:45.0
has name origin parallax secondhas source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:45.0
has proposer Bessel and Meadowshas source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:45.0
has equivalent 3.08572 × 1016 mhas source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:45.0
has equivalent 3.26168 light yearshas source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:45.0
has equivalent 2.062648 × 105 astronomical unitshas source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:45.0
has approval agency International Astronomical Unionhas source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:45.0
has approval date 1922has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:45.0
has proposal date 1840has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:45.0
has definition A unit used by astronomers to describe stellar distance. It is the distance from which the radius of the earth's orbit would subtend an angle of one second of arc. Alternatively one parsec is the distance at which one astronomical unit subtends one second of arc. The name was proposed by Professor H. H. Turner (1861-1930), Savilian Professor of Astronomy at Oxford.has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:45.0
has definition The distance at which one astronomical unit subtends an angle of one second of arc; equivalently, the distance to an object having an annual parallax of one second of arc. (abbreviation for parallax second)has source: Seidelman, P. 1992 Explanatory Supplement to the Astronomical Almanac, University Science Books, Mill Valley, CA, 2001-09-27 09:32:45.0
has definition Astronomical unit of distance, equal to 3.26 light-years.has source: Ferris, T. 1988 Coming of Age in the Milky Way, Morrow, 2001-09-27 09:32:45.0
has definition The distance at which one astronomical unit subtends an angle of 1 second of arc. 1 pc = 206,265 AU = 3.086 × 1013 km = 3.26 light-years.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:45.0
is an instance of length unit2001-09-27 09:32:45.0
length unitis a unit of length2001-09-27 09:32:45.0
unithas historical origin2001-09-27 09:32:42.0
represents2001-09-27 09:32:42.0

Next length unit: solar radius    Up: length unit    Previous length unit: nautical mile