If the sun were the size of a basketball, the nearest object outside of the Solar System would be some 2000 miles distant. With so much space between the stars, it is unlikely that even a single impact has ever occurred in the disk of a single average galaxy in the universe's lifetime. Now, if we were the only known solar system, this would not be a rational objection to the Impact Theory, since there are many billions of galaxies, and impacts are indeed possible, if improbable. We would expect, however, for solar systems to be so rare that we could never see another planet around another star. However, we know that ours is not the only solar system.
Recent findings indicate that planets are very common indeed around nearby sun-like stars.
This abundance of extrasolar planets clearly falsifies the Impact Theory. It's also important to point out that the solar system is 4.5 billion, not 1.3 billion, years old. Copyright 1998-1999, Room103 group. Don't steal this. All rights reserved.