Here’s how to watch NASA crash a spacecraft into an asteroid—on purpose

NASA’s Double Asteroid Redirection Test (DART) will see if we’re able to defend ourselves against asteroids or comets that are on a high-speed trajectory toward Earth. The goal isn’t to blow up the asteroid, but rather to change its speed and path. The 19-meter spacecraft will be crashed, deliberately, into Dimorphos, which is about twice as high as the Empire State Building and 525 feet wide. NASA expects the impact will take place at 7:14 p.m. ET on Monday, Sept. 26.

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