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parsec
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The answer PARSEC has 102 possible clue(s) in existing crosswords.
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Definitions of parsec in various dictionaries:
noun - a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc
A unit of astronomical length based on the distance from Earth at which stellar parallax is one second of arc and equal to 3.
noun - a unit of astronomical distance
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| In astronomy, this unit of measure is abbreviated pc |
| It's equal to 3.26 light years |
| This unit equal to 3.262 light years can be used to measure the distance between stars |
| Abbreviated "pc", it's a unit of distance used in astronomy equal to 3.21 light years |
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| 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. |
| a unit of distance used in astronomy, equal to about 3.26 light years (3.086 10sup13sup kilometres). One parsec corresponds to the distance at which the mean radius of the earth's orbit subtends an angle of one second of arc. |
| 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 years |
| Parsec description |
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| The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System. A parsec is defined as the distance at which one astronomical unit subtends an angle of one arcsecond, which corresponds to 648000/ astronomical units. One parsec is equal to about 3.26 light-years (30 trillion km or 19 trillion miles) in length. The nearest star, Proxima Centauri, is about 1.3 parsecs (4.2 light-years) from the Sun. Most of the stars visible to the unaided eye in the night sky are within 500 parsecs of the Sun.The parsec unit was probably first suggested in 1913 by the British astronomer Herbert Hall Turner. Named as a portmanteau of the parallax of one arcsecond, it was defined so as to make calculations of astronomical distances quick and easy for astronomers from only their raw observational data. Partly for this reason, it is the unit preferred in astronomy and astrophysics, though the light-year remains prominent in popular science texts a |