Question

what struck earth 4.5 billion years? ​

Answer 1

Answer:

Theia /ˈθiːə/ (Θεία in Greek) or Orpheus (Ορφεύς) /ˈɔːrfiːəs, ˈɔːrfjuːs/) is a hypothesized ancient planet in the early Solar System that, according to the giant-impact hypothesis, collided with the early Earth around 4.5 billion years ago, with the resulting debris gathering to form the Moon.

Answer 2

Answer:

the moon was hidden in the filling.

Explanation:

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