NASA's DART Mission Hammered Its Target Asteroid Into A New Shape. Here's How

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Now, however, scientists have shown that it seems DART didn't just give Dimorphos a push; it also hit Dimorphos with enough kinetic energy to reshape it.

Originally, Dimorphos would have been an oblate spheroid, which is kind of like a squashed ball. The impact of DART at 5 kilometers per second (3 miles per second) sent shockwaves through the asteroid, resulting in it becoming more elongated and shifting its axis of rotation off-center. The new shape is inferred by astronomers from the light curve of the Didymos–Dimorphos system, which is aligned in such a way that we can see them transiting and eclipsing one another.

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