... that calamitous changes to Earth's rotation and the tilt of its spin axis were also affected by the impact. The giant impact theory basically states that late in the formation of the Solar System a Mars-sized object grazed an early...
... over debris coalesced together to create the Moon. The giant impact theory became the leading hypothesis for the Moon's origin as ...isotopic compositions. "So people decided to change the giant impact hypothesis," said Kun Wang, assistant professor in...