Now, I clarify: the problem is that when I try to bring an object into orbit a star or a celestial body orbiting not take him and he goes straight without a goal.
The setting page Sim does not open either, and this does not allow me to reactivate the gravity,not even when I'm crashing a celestial body fragments do not fall.
I do not understand, I hope that it is not just for me or else they are just unlucky...
Then when I open US2 Alpha 7 boot screen is inside the sun.
various images here:
this is the start
planets that can run without gravity
And collisions