A rocket that was launched into space from the USA looks set to crash into the moon and the collision could happen next month.
The four-tonne Falcon 9 was launched from Florida in 2015 as part of Elon Musk's SpaceX project.
It launched a weather satellite but ran out of fuel and has been circling the Earth, the Independent reports.
The mission was conducted to launch the National Oceanic and Atmospheric Administration’s Deep Space Climate Observatory to monitor solar storms.
The rocket was originally due to either return to Earth blast out of orbit - but ran out of fuel for either maneuver.
Experts say the rocket is now is tumbling rather than flying in a line, making predicting its path difficult.
The collision could take place as soon as next month and is due to hit our lunar companion at a velocity of close to 6,000mph.
Bill Gray, who uses software to track near-Earth objects, believes the collision is likely on March 4, although he isn't completely sure yet.
He wrote: "I have a fairly complete mathematical model of what the earth, moon, sun, and planets are doing and how their gravity is affecting the object.
"I have a rough idea of how much sunlight is pushing outward on the object, gently pushing it away from the sun. This usually enables me to make predictions with a good bit of confidence.
"However, the actual effects of that sunlight are hard to predict perfectly. It doesn't just push outward; some of it bounces 'sideways'."
He added: "These unpredictable effects are very small. But they will accumulate between now and 2022 March 4, and we'd really like to determine the impact location as precisely as possible, so that the the Lunar Reconnaissance Orbiter (LRO) and Chandrayaan-2 folks can find the crater (and, if we're lucky, maybe image the impact)."
Bill said: "We'll need (and I am confident will get) more observations in early February to refine the prediction; that will bring the uncertainty down greatly."
