Celestia Forums

I know everyone has wanted to do this, so here it is. I created this system in a few hours, to test Celestia 1.4pre6 ability to render multiple stars for a single system, and here it is.



Just download and place the files in the extras directory and you too can play in the Quin system.
Quin.stc
Quin.ssc

Colourful, that Terra Nova must experience some very weird temperature variations with that many moving stars.

Michael Kilderry

na, the stars are all using cold fusion. :lol:

I know you were just testing things out, but the orbital configuration is also rather unlikely. First, TN would be orbiting a star, not the barycentre. Second, it's likely that you'd have two binary pairs and one solo star. Pair up two stars, figure out where the barycentre is, then pair up another two stars and figure out its barycentre, then treat each barycentre as a a single star with a mass equal to the combined mass of its stars. Then find the barycentre that THOSE barycentres orbit, treat that as a solo star with the mass of all four stars, and then find the real barycentre of the system which is the barycentre between THAT and the final solo star. I think. It's kinda complicated when you have that many stars

Also, IIRC I don't think Celestia can handle direct illumination from more than two stars?

EDG,

The OpenGL 2.0 rendering path currently is supposed to support up to 4 simultaneous light sources. It's still rather buggy, though.

My understanding is that a future major release (after v1.4.0) probably will support an arbitrary number of light sources.

Ah, I don't have a video card that can support OGL 2.0 so maybe that's why I thought it could only handle two sources.

Someday I'll upgrade...

I just wanted to see if it was possible, yes. The reason why is I was hoping to make a model (however inaccurate) of the galactic core, with it?€™s two super massive black holes

The idea was to have the Black holes orbit each other, dragging stars with them, or one of them.

Sagittarius A* (Sgr A*)
Mass: Estimated to contain the mass of 3.7 million suns.
Coordinates: 17:45:39.95-29:00:28.2, ICRS 2000.0
Distance 26,000 light years

GCIRS 13E
1.5 light-years from the fringes of the known super massive black hole.
It is an intermediate mass black hole, packing about 1,300 solar masses.

?€?Orbiting the presumed middleweight are seven stars, each of which in its prime was more than 40 times the mass of the Sun. Even as corpses they contain five to 10 solar masses. The whole setup is racing around the galactic center at 626,300 mph (280 kilometers per second?€

Chis
If you read this, can ad the feature to make stars to be sub-objects of other more massive objects, Barycenter works, but not defiantly not in the case of Sagittarius A* (Sgr A*). Which by the way you be the best next data point to base all object upon as alluded to in
http://www.celestiaproject.net/forum/viewtopic.php?p=9424. Sagittarius A* is now more or less regarded as the center of the galaxy.

Also for stars that orbit Barycenter, it would be nice to see the paths just like the other.

Why does barycenter not work for Sgr A* ?

You can define it as a star or as an emissive planet orbiting the barycenter with 0 SMA and an arbitrarily long Period.

Of course, Celestia doesn't draw stars reliably if they're more than 16K LY from the sun, but that's a separate graphics issue, not one related to orbital mechanics.