Re: world to xy

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Steve Baker (sbaker++at++link.com)
Tue, 28 Oct 1997 09:17:14 -0600 (CST)

On Tue, 28 Oct 1997, Javier Abadia Miranda wrote:

> Now a question: Do you have a method to find out
> sun position given Latitude of the place, day of
> year and time of day ?
>
> And: Do you have a method to correctly position
> the 3010.star sphere in a scene honoring Latitude
> time of "night" and day of year ?
>
> I don't need absolute exactitude, but I would
> apreciate a clear answer, possibly including source.

The guys working on the 'flightgear' freeware flight simulator
have code for sun, moon, stars and even planets!

check out:

    http://www.menet.umn.edu/~curt/fgfs

Also, "Dans' Astronomy Software Collection" on:

   http://www.isc.tamu.edu/~astro/software.html

...and "Astronomical Software for Microcomputers" from Sky and
Telescope magazine...

   http://www.skypub.com/software/software.shtml

This should be enough to solve your problems.

Steve Baker 817-619-8776 (Vox/Vox-Mail)
Hughes Training Inc. 817-619-4028 (Fax)
2200 Arlington Downs Road SBaker++at++link.com (eMail)
Arlington, Texas. TX 76005-6171 SJBaker1++at++airmail.net (Personal eMail)
http://www.hti.com http://web2.airmail.net/sjbaker1 (personal)

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