In what could be straight out of a sci-fi film, on September 26, NASA will deliberately crash a spacecraft into a near-Earth asteroid to try and change its motion and direction through space.
It’s called DART or the Double Asteroid Redirection Test. A spacecraft about the size of a refrigerator will impact the moonlet Dimorphos at about 6.6km/s (14,768 mph) to change its orbit within the Didymos binary asteroid system, a pair of non-Earth threatening asteroids that orbit each other some 11 million kilometers (6.7 million miles) from Earth.
It’s a super exciting test to see if intentionally crashing a spacecraft into an asteroid is an effective way to change its course through space.
NASA goes into more detail here