Eric knows there's no sound on the Moon. At least his(?) subtitle -
> The object will be traveling at 2.43 km a second, or 5,400 mph, upon impact.
- is not a science education fail.
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Most of the times the title is written by someone else. My guess is that they go to something like https://www.wolframalpha.com/input?i=2.43+km+a+second [1] and copy the most clickbaity version.
[1] I didn't get 7x speed of sound, but you may be more lucky.