on 2002/04/26 23.43, Barbara and/or Bill Hooper at [EMAIL PROTECTED] in
[USMA:19673] wrote:
Dear Bill,
Thanks. I'll add this to my 'Rules of thumb' list in this form:
In the course of a year light will travel about 10 petametres. In the olden
days this was sometimes called a 'light year'.
Cheers,
Pat Naughtin
CAMS - Certified Advanced Metrication Specialist
- United States Metric Association
ASM - Accredited Speaking Member
- National Speakers Association of Australia
Member, International Federation for Professional Speakers
--
> on 4/25/2002 10:00 PM, Bill Hooper at [EMAIL PROTECTED] wrote:
>
>> It is hoped that, before that happens, astronomers will
>> have abandoned the light-year entirely in favor of units like
>> terametres: 1 light year equals about
>> 10 terametres (10 Tm).
>
> Sorry about the slip-up above. That should have been:
>
> 1 light-year = about 10 petametres (10 Pt)
>
> I was off by a factor of 1000.
> (1 Pm = 1000 Tm)
>
> Regards, Bill Hooper
> college physics teacher (retired), USA (Florida)
>
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> Do It Easy, Do It Metric!
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>
