The earth formed by an asteroid is a non-provable theory. Complex systems are not formed from less complex systems without intelligent intervention. You can not take random DNA and create a complex functional human being. You can not take a computer language and random create a fully functioning ERP system.

See "The rare earth" and "The Intelligent Universe" and the "Bible"

1. The earth has a ocean
2. It has an atmosphere for sustaining carbon life forms
3. The earth has tetonic plates that allow the atmosphere to form
4. The earth has a dipole electromagnetic sphere to prevent cosmic radiation for destroying all live
5. The earth has a moon affecting the ocean tides and weather
6. The earth has the correct mass. If the mass of the earth were double or half it current mass , biological functionality would break down
7. The earth has a perfect balance between negative and positive charges, equilbrium
8. The earth is the correct distance from the sun
9. The Solar system is in the best place on the spiral wing of the milk way
10. Hydrogen to Helium burn ratios are perfect, allowing supernovas to form that create the higher elements
11. The ecological system is perfect balance creating oxygen and recycling carbon dioxide
12. Volcanos recycle carbond dioxide preventing a ice age

Explain the velocity and distance from the earth that the moon would have been traveling to get caught in its orbit.

Scientist use supercomputers to determine multi-varient probabilities of speed and trajectory to obtain orbit for a space ship entering the earths orbit.

How did the moon obtain the perfect orbit, so it does not fall into the earth nor fall out in space?