. Chinese officials deny this was their booster, though, so its origin remains somewhat of a mystery. The biggest takeaway here is how alarming it is that no one was sure exactly what this piece was, or where it came from—and that there are many other lost hunks of space debris just like it.Although this crash was a loss for lunar scientists, there have been intentional impacts on the moon before—notably, a mission to hit a permanently shadowed crater on the moon’s south pole in 2009.
“Thankfully, no known asteroid big enough to penetrate our atmosphere is a threat to impact Earth at any time in the next century,” says Angela Stickle, planetary scientist at Johns Hopkins Applied Physics Lab and DART team member. But if an as-yet undiscovered asteroid is on a collision course with Earth, she adds, “we want to be prepared.”
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