Then there are moons of Gas Giants within habitable zones, which can have orbits of 2 mln kilometres, ie, within a several weeks they move 4 mln kilometres closer to the star, than back, not including ecliptical orbit of the giant itself.
Well. 2Mkm is peanuts at this scale you know...
Earth have a 5Mkm difference between its aphelion & perihelion.
And a Jovian sized object in place of the earth would have a hill sphere radius of 3Mkm. Even an object 5 time more massive will still only have a 6Mkm radius. Good ol' sun is quite massive.
Too bad Aurora generated system does not seems to take this constraint into account, leading to some quite funny results
![Smiley :)](http://aurora2.pentarch.org/Smileys/classic/smiley.gif)
More into the subject : I'm in favor of keeping it moderately simple, but adding a need for water to the mix would be welcome.
Also, the sudden "Cost 2 to 0 thanks for the 0. 0999 atm of oxygen becoming 0. 1 atm is quite annoying.
[edited : I'm still a noob as it seems...]
"An astronomical body's Hill sphere is the region in which it dominates the attraction of satellites. To be retained by a planet, a moon must have an orbit that lies within the planet's Hill sphere." Thanks Wikipedia