Here, we'll be dealing with a Physics-correct planet in a universe with very similar physics laws.
If you want to drastically change the laws of physics, see some tips on different physics.
If you want to change some laws of physics (like having warp drives - which are theoretically possible in our universe), read on, but take a peek at tweaking and nudging physics into shape.
We'll touch on the basic things on space and what can, can't and maybe possible for you to do with your universe.
- http://history.nasa.gov/SP-345/sp345.htm : NASA's analysis of our solar system.