If everything goes as planned, and the laws of gravity and motion don’t change at the last minute, the asteroid collision will happen on Monday at exactly 7:14:23 EST.
How it works: NASA hopes to hit an asteroid now in case we really need to knock one away later
Previous space science missions by NASA and the Japanese space agency took samples of asteroids, but those were carefully choreographed rendezvous involving gradual approaches. DART envisions a high-speed crash. The scientists and engineers behind the mission say they won’t know if they’ll hit the asteroid until about 20 seconds before impact.
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