Mail Archives: djgpp/1998/03/16/21:30:59
Here is the NASA Twelve Year Planetary Ephemeris: 1995 - 2006 for
our solar system.
http://planets.gsfc.nasa.gov/TYPE/TYPE.html
If you get this done this year, let alone this week you should
immediately apply for a job at NASA.
Regards,
John
On 16 Mar 1998 16:51:07 GMT, NOSPAMsl AT psycode DOT com (Gili) wrote:
>Hello,
>
> I have a science project due next week. I am programming something
>which will find the most efficient orbit given certain parameters.
>However, I have been unable to find the locations of all planets (and
>their moons) in our solar system at a fixed time. In order for my
>program to work, I must have the positions of all planets (and their
>moons) at a fixed time (so I know where they all begin off) and I also
>need to know their exact velocity at that given time.
>
> My program will launch a rocket into space where it will be totally
>under the influence of gravity (which is why I need to know the
>positions/velocities of those planets.) However, I have run into
>another problem, how do I know the positions of the planets in the
>solar system after 1 second has past? The same goes for my rocket..
>
> I can resolve the force vectors being applied by all the
>planets/moons on my rocket, and I know its position and velocity. But
>where do I go from there? How do I know where it will be a second
>later?
>
> Please help me as soon as possible. Thank you,
>
>PS: Please email your response to "sl AT psycode DOT com"
>
>Gili
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