What astronomical event is thought to be responsible for creating the heaviest, rarest elements like Gold and Uranium?

Answer

Merger of two neutron stars (a kilonova event)

The heaviest and rarest elements, such as Gold and Uranium, are theorized to be created in the most extreme stellar events, often during the merger of two neutron stars.

What astronomical event is thought to be responsible for creating the heaviest, rarest elements like Gold and Uranium?

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