An asteroid the size of two football pitches will dash past the Earth just before 6am tomorrow morning.
Named 2017 TS3, the huge ball of stone measures up to 720ft (219m) in diameter and will accelerate past the planet at a whopping 22,000 mph (35,000 kmh).
With the average football pitch from 90m to 120m in length, that makes TS3 as big as two full-sized pitches.
But even Lionel Messi would have a hard time getting the ball under control on the surface of the Earth-bound asteroid, which will pace across the solar system at 30 times the speed of sound.
Nasa reported the asteroid will pass by at around 5.51am GMT tomorrow, Tuesday November 2, Newsweek reported.
Yet despite the "close approach", TS3 poses no threat to the (mostly) sleeping Brits down on Earth as it will never get much closer than 5.4 million miles away – 14 times further than the moon.
TS3 will get closer to us as it circles the Sun, though admittedly it won't exactly be an earth-shaking encounter.
Depending on Nasa's fears for the consequences of an asteroid on our planet, they may declare the incident a Potentially Hazardous Asteroid (PHA).
This is unlikely to happen for TS3 because, despite its incredible pace, it is smaller than many of the asteroids out there and won't get too close to the Earth.
PHA events are usually limited to asteroids which pass within 4.5 million miles of Earth and measure more than 140m in diameter.
Earlier this month scientists feared a Pyramids of Giza-sized asteroid could hit the Earth's atmosphere.
2017 SM3 measured 520 ft and was classified by Nasa as a Near-Earth Object (NEO).
Luckily, the huge rock kept a safe distance at 3.5 million miles from Earth.
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