'Little Bang' Triggered Solar System Formation

For several decades, scientists have debated whether the Solar System formed as a result of a shock wave from an exploding star -- a supernova -- that triggered the collapse of a dense, dusty gas cloud that contracted to form the Sun and the planets. Now, astrophysicists have shown for the first time that a supernova could indeed have triggered the solar system's formation under conditions of rapid heating and cooling.

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