NASA recently smashed a spacecraft into an asteroid to test a concept for a future planetary defense system. Is it a coincidence that asteroid Dimorphos is about the same size as Apophis, which will make a near-pass of Earth in 2029?
NASA recently smashed a spacecraft into an asteroid to test a concept for a future planetary defense system. Is it a coincidence that asteroid Dimorphos is about the same size as Apophis, which will make a near-pass of Earth in 2029?