The first rocky planets may have formed just 100 million years after the Big Bang, scientists say — and they could have been surprisingly Earth-like

The first planets in the universe may have appeared far sooner than astronomers once imagined.

A new computer simulation suggests that rocky, potentially habitable planets could have begun forming only about 100 million years after the Big Bang — a time when the universe was still in its infancy and the first galaxies had not yet fully emerged.