NASA’s DART spacecraft bumped an asteroid off its orbit TechCrunch
The demise of a spacecraft is usually something rather poignant. But two weeks ago, NASA celebrated one’s destruction.
On September 26, NASA executed the final stage of the Double Asteroid Redirection Test (DART), in which a spacecraft intentionally crashed into the asteroid Dimorphos to investigate whether such an impact could deflect an Earth-bound stellar object. A successful collision was the first cause for celebration, but now there’s even more reason to cheer. NASA has officially determined the DART mission a success, revealing in a press conference today that Dimorphos’ orbit has changed significantly due to the impact.
In crashing DART into Dimorphos, planetary defense researchers hoped the spacecraft’s kinetic energy would transfer to the asteroid, altering its path. In theory, the same method could be used to protect Earth from an incoming asteroid. (For what it’s worth, neither Dimorphos nor the larger asteroid Didymos, which it orbits, poses a threat to our planet.)
For mission success, DART needed to change Dimorphos’ nearly 12-hour orbital period around Didymos by at least 73 seconds. After two weeks of observations, the team revealed a 32-minute change in Dimorphos’ orbital period — more than 25 times longer than the benchmark for success.
“This result is one important step toward understanding the full effect of DART’s impact with its target asteroid,” Lori Glaze, director of NASA’s Planetary Science Division, said in a press release. “As new data come in each day, astronomers will be able to better assess whether, and how, a mission like