The goal was simple but ambitious: to find out whether humanity could one day deflect a dangerous space rock hurtling toward our planet.

The mission called DART (Double Asteroid Redirection Test) deliberately struck the asteroid to slightly alter its path. Now, more than three years later, scientists have released detailed results showing that the impact did indeed shift the asteroid’s orbit. The findings were published in the journal Science Advances.

According to the new data, about 770 days after the impact, the asteroid’s trajectory has measurably changed. Researchers found that Dimorphos’s speed altered by roughly 1.7 inches per hour a tiny shift, but one that will continue to grow over time and significantly change its course.

Experts say this confirms the effectiveness of the DART technique, suggesting it could one day be used to ward off a potentially disastrous asteroid on a collision course with Earth.

‘This is the first time humanity has intentionally changed the motion of a celestial object,’ said mission scientists, calling the achievement a monumental step in planetary defense.

The spacecraft struck Dimorphos at a blistering speed of 23,500 kilometers per hour. Although Dimorphos itself posed no danger to Earth, the mission served as a crucial test run for defending our planet against real threats.

Scientists have already identified many asteroids that could wreak havoc if they hit Earth, but for now, none pose an immediate risk. Still, researchers worry that among thousands of smaller asteroids, one day there might be one with a trajectory that could bring it dangerously close.

The DART spacecraft was built by NASA in partnership with the Johns Hopkins Applied Physics Laboratory and launched toward Dimorphos in November 2021.

NASA officials emphasize that even the slightest change in an asteroid’s orbit can yield a large effect over time, potentially steering it safely away from Earth. This milestone not only demonstrates human ingenuity but also offers a new layer of protection for future generations.