Before other start to point it out, I will also state that we have other thing that limit our Free Will....but those powers can't live without a group accept it by their free will.

The most important is:

"The Will of Belief", which make a big limit in what we can do, because our belief hinder us in investigating further, that is why you always shall ask yourself WHY?
"The will of Society or Government" which makes up rules that what is accepted behavior and what is not, again it need the "Will of Many" to stay in power.
"The will of Power" This can also be the Government, but also a Group, or a financial power, that limit your free will.

There are others, but the main thing with them is that they are man made, and have nothing to do with the star, but most of all they go in "The power of Belief"