New Scientist on MSN
Forming moon may have taken three big impacts early in Earth’s history
Conventionally, the moon is thought to have formed during one big impact, but a three-impact model might make more sense ...
Roughly four and a half billion years ago the planet Theia slammed into Earth, destroying Theia, melting large fractions of Earth’s mantle and ejecting a huge debris disk that later formed the moon.
Which solar system model is best? For as long as humans could look up at the night sky, we’ve been fascinated with the stars. How far away are they? Where did they come from? What secrets do they hide ...
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