First off, love the space.com forums etc. I essentially knew nothing about space but since I have been lurking and learning over the last few weeks and it is really great to read all the info/opinions you guys have. I am not sure the best way to phrase my question so I will just do my best. What causes earth, and all the other planets for that matter to be not drawn into the sun? I get the idea of our planet kind of "falling" around the sun, which I could see it doing a number of times before being finally drawn into it. But since I believe our orbit around the sun stays the same or at least very close to the same I just can't seem to grasp what is happening. Is there some opposing force keeping us in place against the gravity?