NASA launched a mission to deliberately smash a spacecraft into an asteroid – a test-run should humanity ever need to stop a giant space rock from wiping out life on Earth.
It may sound like science fiction, but the DART – Double Asteroid Redirection Test – is a real proof-of-concept experiment. It blasted off at 10:21pm on Tuesday (06:21 GMT Wednesday) on board a SpaceX rocket from Vandenberg Space Force Base in California.
The goal is to slightly alter the trajectory of Dimorphos, a “moonlet” about 160 metres (525 feet) wide that circles a much larger asteroid called Didymos 762 metres (2,500 feet) in diameter. The pair orbit the Sun together.
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