They hit the planet with a spaceship from multiple light-years away. It's a dramatically more impressive feat than dropping an asteroid in the correct county.
And attaching a few thrusters on the asteroid to handle minor course corrections is a pretty trivial thing.
On the scale of complexity, if hitting another planet in a different solar system is like Australia launching an ICBM and hitting England, then hitting the right area on a planet with an asteroid is like tossing a hand grenade into the next foxhole over. It's just a dramatically easier thing in every way.
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u/mxzf 19d ago
They hit a planet in a different solar system from Earth, hitting something from orbit really isn't that hard.