I know you shouldn't have to, but if you think on it, the relative distance of the ships and the star would be very different - the ships would be at a few thousand miles, the sun at maybe a few hundred thousand
I do mine with mostly fractals - they're relatively easy to do though. Just make a planet texture, about 5000x5000 or above, and start with a plain, slightly desaturated colour. Build up on that with a lot of fractals on soft light, or screen on a low opacity - the idea is to get a texture that has a lot of details, but very little contrasting points. Then spherise, and postwork, using fractals for the flares.