StarDestroyer.Net BBS

Are there any applications out there that allow you to, essentially, create a solar system, with different masses/types of stars (one or more), planets, and so forth and then test their stability over the eons?

Yes.

Is there one that lets you model Sol system planetary positions by date?

That's the right idea, but it's a lot more limited than what I'm after. I'd like to see stuff like radiation output, habitability bands, and support for numerous bodies rather than just four.

Stark wrote:Is there one that lets you model Sol system planetary positions by date?

http://www.shatters.net/celestia/

It had a date feature last time I checked.