And that raises an intriguing counter-theory: maybe that Mars-size impactor, which planetary scientists call Theia, isthe object that became Mercury. If that's correct, the answer to where Mercury's rocky outer layer went might not be under our feet after all. ...
The current theory of how Earth and Moon came to be, as we know them today, is called the Giant-Impact Hypothesis. Essentially, billions of years ago, proto-Earth was all alone as it circled the Sun, until a fateful collision with a Mars-sized protoplanet sc...
The current theory of how Earth and Moon came to be, as we know them today, is called the Giant-Impact Hypothesis. Essentially, billions of years ago, proto-Earth was all alone as it circled the Sun, until a fateful collision with a Mars-sized protop...