NASA successfully crashed a spacecraft into a small, nonthreatening asteroid. It marks the first time humans have changed the court of a celestial body.
Artist's illustration of the DART mission right before impact. Image: NASA/Johns Hopkins APL/Steve Gribbeninto a small, nonthreatening asteroid on Monday in an experiment to change the space object's orbit around a larger space rock.
The impact marks "a new era of humankind, an era in which we potentially have the capability to protect ourselves from a dangerous asteroid impact," Nancy Chabot, a planetary scientist at the Johns Hopkins University Applied Physics Laboratory, said.Dimorphos, the target asteroid, was chosen because it's a moon of a larger asteroid called Didymos, according toEarth-based telescopes can view the duo even though they are roughly 6.8 million miles away.
Astronomers have calculated Dimorphos' pre-impact orbit by measuring variations in brightness from the asteroid moonlet passing behind and in front of the larger asteroid from Earth’s viewpoint.NASA and Johns Hopkins University Applied Physics Laboratory astronomers will compare Dimorphos' post-impact orbit to the baseline they already acquired to assess how much it was deflected by DART.— which is about the size of vending machine — last year.
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