12 lines
2.2 KiB
HTML
12 lines
2.2 KiB
HTML
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>attoparsec</title><link rel="stylesheet" href="../../jargon.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.61.0"/><link rel="home" href="../index.html" title="The Jargon File"/><link rel="up" href="../A.html" title="A"/><link rel="previous" href="atomic.html" title="atomic"/><link rel="next" href="Aunt-Tillie.html" title="Aunt Tillie"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">attoparsec</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="atomic.html">Prev</a> </td><th width="60%" align="center">A</th><td width="20%" align="right"> <a accesskey="n" href="Aunt-Tillie.html">Next</a></td></tr></table><hr/></div><dt><a id="attoparsec"/><dt xmlns="" id="attoparsec"><b>attoparsec</b>: <span xmlns="http://www.w3.org/1999/xhtml" class="grammar">n.</span></dt></dt><dd><p> About an inch. <span class="foreignphrase"><i class="foreignphrase">atto-</i></span> is the standard
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SI prefix for multiplication by
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<tt class="literal">10<sup>-18</sup></tt>. A
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parsec (parallax-second) is 3.26 light-years; an attoparsec is thus
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<tt class="literal">3.26 ×
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10<sup>-18</sup></tt> light years, or about 3.1
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cm (thus, 1 attoparsec/<a href="../M/microfortnight.html"><i class="glossterm">microfortnight</i></a> equals about 1
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inch/sec). This unit is reported to be in use (though probably not very
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seriously) among hackers in the U.K. See
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<a href="../M/micro-.html"><i class="glossterm">micro-</i></a>.</p></dd><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="atomic.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="../A.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="Aunt-Tillie.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">atomic </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Aunt Tillie</td></tr></table></div></body></html>
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