Illustration of an exoplanet in the start of the universe
Darryl Fonseka / Alamy
Conditions in the early universe could have allowed rocky planets with water to train much earlier than expected, potentially allowing life to start earlier too.
Astrophysicists studying the start of the universe think that planet's formation did not seriously start until Supernovae has published enough heavy elements to form planets, the constituent elements of rocky planets, around the stars. Our sun and its planets appeared when the universe was about 9 billion years old, and the oldest known planet developed 1 billion years in the life of the universe.
