Double Asteroid Redirection Test
The Double Asteroid Redirection Test (DART) was a NASA space mission for planetary defense against near-Earth objects (NEOs). It was made to see how much a spacecraft could move an asteroid out of its trajectory (the path it is guessed to travel.) The asteroid that was picked was not dangerous to earth, and was picked because it was simple. The spacecraft flew on the 24th of November 2021, and hit what it was aiming for, the asteroid Dimorphos.