| slovo | definícia |
parsec
(encz) | parsec,parsek n: [astr.] délková jednotka joe@hw.cz |
parsec
(gcide) | parsec \par"sec\ (p[aum]r"s[e^]k), n. [From parallax second. See
parallax second and annual parallax, under parallax.]
(Astron.)
A unit of length used in describing astronomical distances,
equal to 3.26 light years, or 3.086 x 1013 km. Abbreviated
pc. The derived units of kiloparsec (kpc, 1000 parsecs) and
megaparsec (mpc, one million parsecs) are often found in
discussion of astronomical distances.
[PJC] |
parsec
(wn) | parsec
n 1: 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 [syn: parsec, secpar] |
parsec
(foldoc) | PARSEC
An extensible language with PL/I-like syntax,
derived from PROTEUS.
["PARSEC User's Manual", Bolt Beranek & Newman, Dec 1972].
(2009-06-26)
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| | podobné slovo | definícia |
megaparsec
(encz) | megaparsec,megaparsek n: Zdeněk Brožmegaparsec,milion parseků Zdeněk Brož |
parsecs
(encz) | parsecs,parseky n: pl. Zdeněk Brož |
attoparsec
(foldoc) | attoparsec
About 31 mm (one inch). "atto-" is the
standard SI prefix for multiplication by 10^-18. A parsec
(parallax-second) is 3.26 light-years; an attoparsec is thus
3.26 * 10^-18 light years. Thus, one attoparsec per
microfortnight is about one inch per second.
This unit is reported to be in use (though probably not very
seriously) among hackers in the UK.
[Jargon File]
(1996-12-08)
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attoparsec
(jargon) | attoparsec
n.
About an inch. atto- is the standard SI prefix for multiplication by 10^
-18. A parsec (parallax-second) is 3.26 light-years; an attoparsec is thus
3.26 × 10^-18 light years, or about 3.1 cm (thus, 1 attoparsec/{
microfortnight} equals about 1 inch/sec). This unit is reported to be in
use (though probably not very seriously) among hackers in the U.K. See {
micro-}.
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