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  1. Xref: sparky sci.space:11721 sci.physics:12756
  2. Newsgroups: sci.space,sci.physics
  3. Path: sparky!uunet!elroy.jpl.nasa.gov!nntp-server.caltech.edu!keith
  4. From: keith@cco.caltech.edu (Keith Allan Schneider)
  5. Subject: Re: Parsecs?
  6. Message-ID: <1992Aug13.030630.3919@cco.caltech.edu>
  7. Sender: news@cco.caltech.edu
  8. Nntp-Posting-Host: coil
  9. Organization: California Institute of Technology, Pasadena
  10. References: <1992Aug11.205655.6840@csi.on.ca> <1992Aug11.211445.6928@csi.on.ca>     <1992Aug12.013040.618@leland.Stanford.EDU>     <1992Aug12.024141.4913@utdallas.edu> <ZOWIE.92Aug12004854@daedalus.stanford.edu>
  11. Date: Thu, 13 Aug 1992 03:06:30 GMT
  12. Lines: 15
  13.  
  14. zowie@daedalus.stanford.edu (Craig "Powderkeg" DeForest) writes:
  15.  
  16. >bcollins@utdallas.edu (Arlin B. Collins) writes:
  17. >   (Brian Kemper) writes:
  18. >   > (Richard Martin) writes:
  19. >   > > Please forgive my ignorance, but what the heck is a parsec?
  20. >   > I know a parsec is a unit of distance equal to roughly 3 light-years ...
  21. >   One parsec equals  30.857x10**12 km, 206265 astronomical units, and
  22. >   3.2616 light-years.
  23.  
  24. Hmmm...  at the distance of one parsec, one astronomical unit subtends an
  25. angle of one arc second.
  26.  
  27. keith
  28.  
  29.