Source: WikiMedia Commons
A Chinese rocket the height of an 8-storey building is expected to fall back to Earth tonight.
It was launched a few weeks ago as part of the country's efforts to construct a space station.
The debris weighs around 20 tonnes and space commentator Leo Enright says no one really knows where it will fall.
"We know that most of Europe, including Ireland is entirely safe, because of the angle of the orbit of this thing - it's not going to go anywhere near Ireland.
"Populated areas of South America, North Africa, Asia, India, Australia and Southern Europe are still in the frame, potentially, for this thing to fall onto the ground."