Today, the Double Asteroid Redirection Test (DART) spacecraft successfully slammed into its target, an asteroid called Dimorphos. NASA controllers deliberately crashed the $330 million robot spacecraft into Dimorphos, which passed at a distance of about 10.8 million kilometers from the Earth.  When striking its target, the Dart spacecraft traveled at over four miles per second and was almost immediately destroyed. The aim of this kamikaze mission is to learn how to deflect asteroids that may collide with our planet in the future.  “We know asteroids have hit us...