NASA has warned that a huge asteroid of the same size as Jumbo Jet is now on our planet.
The asteroid, known as the BC9 2019, will take a "close approach" to Earth at around 17.59 GMT, and at that point it will go to 29.5 km / h.
Fortunately, at that point, the asteroid will still be about three million miles from Earth.
However, this NASA believes it is close.
2019 BC3 is about 31-69 meters in diameter.
To rate it at the top of the perspective, it's the same size as Jumbo Jet!
Before you start to panic about the end of the world, the good news is that BC3 in 2019 is unlikely to hit Earth.
NASA said: "NASA knows there is no asteroid or comet at the moment with the Earth, so the probability of a big collision is quite small.
"In fact, as much as possible, no big object in the next hundred years will probably never reach the Earth."