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RE: LightYear Conversion is Incorrect in Units Package

• To: mathgroup at smc.vnet.net
• Subject: [mg28621] RE: [mg28605] LightYear Conversion is Incorrect in Units Package
• From: "David Park" <djmp at earthlink.net>
• Date: Wed, 2 May 2001 03:37:12 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Hi Bob,

Thanks for the correction. It is easy to forget the various definitions of
the year. Using TropicalYear is the closest, but even that is a little off.

Anyway, don't change Units!

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/


>
> The difference is due to the meaning of Year.
>
> Convert[Year, Day]
>
> 365*Day
>
> Convert[Convert[LightYear, Meter]/SpeedOfLight, Day]
>
> 365.24110215533767*Day
>
>
> Bob Hanlon
>