A series of new studies determined that NASA's DART method is a viable technique for planetary defense.
into the asteroid Dimorphos, which orbits around the larger Didymos asteroid to make up the Didymos system.that initial observations showed that the DART mission reduced the orbital period of Dimorphos around Didymos by roughly 32 minutes.
That might seem like a relatively small amount, but a relatively small change can massively alter the trajectory of a space rock over months and years. The trick is in spotting a potentially hazardous asteroid headed toward Earth well ahead of time. Thankfully, Didymos poses no danger to Earth, and it was merely used as a test subject for NASA's planetary defense test.Now, the new scientific papers confirm that the DART technique is a viable method for other potentially dangerous space rocks. They also provide surprising new details about the mission, such as the fact that it dislodged one million kilograms of debris from Dimorphos's 4.
"Pre-impact, we expected the impact to shorten Dimorphos' orbit by only about 10 minutes," Tony Farnham, co-author of one of the studies, explained in"But after the impact, we learned that the orbital period was shortened even more, reducing an ordinarily 12-hour orbit by slightly more than 30 minutes. In other words, the ejected material acted as a jet to push the moon even further out of its original orbit.
NASA, meanwhile, has also shared a time-lapse video captured by Hubble of the impact. The fascinating reel shows how the dust cloud ejected by the collision evolved over the hours and days after impact, including its morphing
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