NASA’s Double Asteroid Redirection Test (DART) was Earth’s first attempt at launching a spacecraft to intentionally collide with and deflect an asteroid as a planetary defense technique. On September 26, 2022, the DART spacecraft collided with a small asteroid moon called Dimorphos, which orbits a larger asteroid called Didymos. Neither asteroid posed a threat to Earth, but they represented similar celestial bodies that could one day approach and endanger the planet.
Click here for original story, New NASA DART data prove viability of asteroid deflection as planetary defense strategy
Source: Phys.org