Can I use US2 to commercial projects?

[Indoctrine]

Hello

I have question about possibility of using US2 to RPG books, as a screenshots of fictional celestial bodies, star systems and other things. I am author of SF RPG system published in Poland (and sadly - in polish languae only), and in planned addon, there are many typical space landscapes, star systems, planets present.
US2 is very accurate tool, to make realistic cosmic objects, so I was thinking of using it to visualize few fictional star systems and planets. But I don't know if I can
If it is possible, what kind of copyright note should be inserted in the book?

[tkulogo]

I also have an interest in this very question. I currently use Universe Sandbox for the Firefly RPG for personal use, but I've considered creating systems for other games that people I know are working on, and I'm not sure on the legal aspects.

[Jar]

Generally, we think it's great to share Universe Sandbox, so we allow using images in other projects as long as attribution is provided. We have guidelines here: http://universesandbox.com/usage

If you have any further questions about what's written there or how it applies to your project, please email us so we can discuss it: http://universesandbox.com/contact/

Thanks!