4.567 billion years ago, the Solar System was born. By 4.560 billion years ago, primitive Earth was formed, with subsequent creation of the Moon nearing 4.550 billion years ago. At the time of its formation, the Hadean primitive Earth was a dry naked planet, lacking both an atmosphere and ocean, and it was covered by an anorthositic primordial continent. 4.567 billion years ago : The formation of the Solar System. 4.56 billion years:ago : The formation of the Earth. 4.55 billion years ago : Giant impact.