On Monday (Sept. 26) at 7:14 p.m. EDT (2314 GMT), if all goes well, NASA s DART spacecraft will crash into the asteroid Dimorphos in an attempt to alter the moonlet s trajectory.
If an asteroid was hurtling towards Earth, like the one that wiped out the dinosaurs, could we stop it? That's what NASA's Double Asteroid Redirection Test (or DART) is trying to work out.