NASA reveals close encounter with a small asteroid
While you were sleeping, Earth had a relatively close encounter with a small asteroid.
The space rock was on track to pass within about 44-thousand kilometres of Antarctica overnight.
NASA scientist Michael Kelley says that's ``pretty close'' as these things go.
There was never any chance the asteroid would hit the planet - but future ones might.
That's why NASA planned to use the flyby to run a sort of cosmic fire drill.
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