As some may like to say (believe?) ..the Universe did not creat itself during week ends (...well !!! i did "creat" this solar system during the week end, for the picture... :P ) It s a long and complex process, where a lot is still needed to be understood...

In cosmogony, the nebular hypothesis is the currently accepted argument about how Earth's Solar System formed.

I invite you to travel in our solar system..through space and time..with the beautiful introduction of the movie Contact (from Carl Sagan book ; ) )

And here is an Exelant animation of the Solar System Formation. A Must see !