Analyse @NASA's tweets
We're crashing a spacecraft into an asteroid… on purpose! Our #DARTmission is a #PlanetaryDefense test to change the motion of an asteroid in space, so we could use this technique if an Earth-threatening asteroid were found. Watch Behind the Spacecraft: https://t.co/c3NqOhHcIr https://t.co/Uw5hVk54uP