Greatest mysteries in my head 1

Wookay, this is gonna be something like fahmi's lines in my head but for those of you who didnt read his before....
Its about teories that I sometimes think of but never spoke it out loud (cause it just sounds stupid) but oh well...time to let my mind go wild!!

Newton First law of motion....

First law
It is possible to select a set of reference frames, called inertial reference frames, observed from which a particle moves without any change in velocity if no net force acts on it. This law is often simplified into the sentence "A particle will stay at rest or continue at a constant velocity unless acted upon by an external unbalanced net force"

Well in simple terms, if you throw a ball in a dimension with no air or dust or anything, then it will keep flying straight at the same speed. The ball we throw on Earth curves,slows down, and goes down due to the force\friction of the air pushing it and gravity, and that makes the ball eventually stop.

Here's what im thinking of.....if thats the law of motion, then the Earth's orbit is getting slower and slower, cause alot of forces is acting upon it. Not only the Earth, but maybe also the whole universe with every passing day the orbit time of the planets could be slowed down by a mili second or nano second....but in time to come, that mili second could change to years and eventually the whole universe could stop moving all together.Its a kinda disturbing thought but it seems to be true....Comment me on your teory about this one.