NASA's Double Asteroid Redirection Test (DART) mission, which involved crashing a spacecraft into the asteroid Dimorphos, has provided new insights into the impact and resulting debris. The Hubble Space Telescope captured images revealing a swarm of boulders that were knocked loose from the asteroid upon impact. The mission, aimed at testing the capability of altering the orbit of dangerous asteroids, successfully reduced the length of Dimorphos's orbit by about 33 minutes.

The debris expelled from the collision consists of 37 large boulders ranging in size from 1 to almost 7 meters across. These rocks were likely already present on Dimorphos's surface and were dispersed by the impact. The boulders are slowly drifting away from Dimorphos at a speed comparable to that of a giant tortoise.

The European Space Agency's Hera spacecraft, set to visit the asteroids in 2026, will further study the cloud of boulders. The observations from Hubble and future data from Hera's mission will help determine the precise trajectories of these rocks. This groundbreaking discovery sheds light on the dynamics of asteroid collisions and provides valuable insights for future asteroid deflection missions.