[FoRK] Astronomy units question

Joe Barrera joe at barrera.org
Thu Apr 14 12:49:35 PDT 2005

What units are they using in this article?


    The radius of the disk is at least 43" (330 AU),
    70" (543 AU), and 105" (815 AU) in extent at
    24, 70 and 160 um, respectively.

815 AU is 112 light-hours, according to google,
which is to far off from 105 to make sense.
I'm also not sure what the um is.

- Joe

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