[Kstars-devel] Re: kstars engine?

[karinqe]

That's the most useful site ever. Thank you!

Karinqe
(God I hope this is the right way to answer multiple emails on a
mailing list...)

On 1 October 2010 23:59, Henry de Valence <hdevalence at gmail.com> wrote:
> On 1 October 2010 17:39, Akarsh Simha <akarshsimha at gmail.com> wrote:
>>> On 10/01/2010 01:34 PM, karinqe wrote:
>>> > Hi,
>>> > is there any info about the algorithms the engine uses to predict the
>>> > motions of planets? How do you "solve" the N-body problem? How precise
>>> > is it? What do you take into account?
>>> > I'll look into the code later for more specific information, but now
>>> > I'm just trying to find out which algorithms are often used in
>>> > applications like kstars and don't have enough time to search in the
>>> > source :(
>>> > Could you please give me some hints?
>>> >
>>> > (I'm doing a Bachalor's thesis on the N-body problem...well, at least
>>> > I'm starting)
>>
>> Hi Karin
>>
>> If you are interested in generic numerical integration, though, you
>> should take a look at Step. Step uses a rather simple algorithm (I
>> forgot what it's called), but you might want to use 4th order or 5th
>> order "Runge-Kutta" method. (I've just heard about these from my
>> friend). Apparently it is far better.
>>
>> Regards
>> Akarsh
>
> Here is a page that may be of interest: a survey of common n-body
> numerical integration methods.
>
> http://www.amara.com/papers/nbody.html
> This also includes citations to relevant research papers. If you are
> at a university or have access to one you should be able to get all of
> them; otherwise you will probably only be able to view some of them.
>
> Cheers,
> Henry de Valence
>
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