From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686) Gecko/20030530 Galeon/1.3.5

Description of problem:
The documentation for "units" boasts that the AU is one of the defined
quantities --- yes and no.  It is defined as "astronomicalunit" but nowhere is
"au" explicitly defined.  So when you do calculations with "au" units ends up
thinking it is "a" for atto and "u" for atomicmassunit.  

This is bad for two reasons.  One: I figured that since "au" is mentioned on the
manpage (look in the section "Unit Definitions") then I could use it, but in
fact it is not defined.
Two: the "sundist" is defined as (in /usr/share/units.dat)

sundist                 1.0000010178 au # mean earth-sun distance

which is actually an incorrect definition since "au" is interpretted as an
atto-atomicmassunit!

This is similar to bug 96982 where the parsec was defined in terms of "au"; this
has since been fixed in rawhide by changing the definition to be in terms of
astronomicalunit.  I think a better remedy for all these situations would simply
be to add a line

au               astronomicalunit

to /usr/share/units.dat.  How many people will be using au for the
attoatomicmassunit?

Version-Release number of selected component (if applicable):
units-1.80-4 and units-1.80-7.1

How reproducible:
Always

Steps to Reproduce:
1.type "units"

[scott@lobos ~]$ units
2083 units, 71 prefixes, 32 nonlinear units
 
You have:

2.type "sundist" and hit return twice
You have: sundist
You want:
        Definition: 1.0000010178 au = 1.6605404e-45 kg
You have:

3.
    

Actual Results:  You have: sundist
You want:
        Definition: 1.0000010178 au = 1.6605404e-45 kg
You have:


Expected Results:  I should have gotten the earth-sun distance in meters like this:
You have: 1.0000010178 astronomicalunit
You want:
        Definition: 1.4959802e+11 m


Additional info: