If a proto-planet hit earth. And formed the moon. Why is it a circle and not millons of pices of debris.?

Also why isnt it classified as a planet. Its a cellestal body and we dont know if it actually orbits earth. Why did they declassifie pluto and erin as planets. If its another object in the kepler 11 system then why does it orbit the sun. Can europa actually support life. Is there a univerese in a black hole. Is our universe in a black hole. Is there a black hole in the center of the univerese. How do we know the universe is expanding rapidly. How could the universe go from the size of a pinhead to billons of light years long. What year will the hubble telescope orbit pluto and charon. Ive nener seen such crazy theories in my twelve years of living. Thats right im 12