The impact of the DART spaceship was...harder than expected. In fact, we think it knocked a chunk off the asteroid.
This is both good and bad. Good, because it means we can probably use the technique for larger rocks than we thought it would work for.
Bad, because you want to make sure you don't break something up, but still end up with multiple impactors. That's not great...
Still, we are thinking this is looking like a successful test, and hitting too hard is a pure engineering/math problem.
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