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Re: starship-design: Massively Distributed Computing for SETI

Steve VanDevender wrote:
> Any good astronomical ephemeris program should do that, for the stars
> whose proper motions are known.  There's a very nice program called
> XEphem that runs on UNIX systems.
> Also, Lee, proper motion is defined as a star's average angular motion
> against the sky over a multi-year period, not any instaneous measurement
> of relative velocity.  In general the proper motion of a star has to be
> determined by observations of a star's movement over long periods,
> subtracting out various things like relativistic aberration, parallax,
> and other short-term variations in the star's apparent position.

But alas the program has the limit of about 5,000 BP ( or what ever
year 1 is for astronomers). Part of the time range I am looking
for is to 35,000 BP. No real reason other than I wonder what things
looked like during the last ice age.

"We do not inherit our time on this planet from our parents...
 We borrow it from our children."
"Luna family of Octal Computers" http://www.jetnet.ab.ca/users/bfranchuk