NASA’s DART impactor shows how planetary defense can work

Ars Technica
By John TimmerMar 1, 2023, 2:04 pm185 pts
Enlarge / Hubble images of the debris plume. (credit: NASA, ESA, STScI, Jian-Yang Li) When the NASA DART mission slammed into a small asteroid, we knew with great precision how much the spacecraft weighed and how fast it traveled. If you combine that with our estimates of the motion and mass of its target…

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