A huge "planet killer" asteroid has been discovered and is heading in our direction. The space rock 2022 AP7, which has a diameter of 1 to 2 km and passes our orbit, has "no risk" of impacting Earth.
In a plan straight out of a sci-fi film, NASA will be deliberately crashing the Dart robot spacecraft into an asteroid in order to determine whether the collision can change the latter’s course. The target of this test is the asteroid called Dimorphos and the spacecraft will crash into it while travelling four miles/sec.