Just thought of this one, might be pretty easy, but I think it should be challenging enough.
For trillions of years, quietly I sat.
Well, I wasn't quiet at all, but it sure seemed like that.
For I work in the background, doing my part,
If I were not there, it would all fall apart
I am appreciated by all, and understoood by some.
With my prefix lies the power of the people; with my suffix their home
Take care not to touch me, for I might make you fly
Now tell me, if you can: What am I?