A defunct Chinese space station is falling back to Earth.
The European Space Agency says the Tiangong-1 will enter Earth's atmosphere sometime between Friday and Monday, but the exact time of the uncontrolled fall is hard to predict.
The ESA says its debris could be showered over an area covering thousands of square kilometers, but noted the risk to people will be very small.
The Tiangong-1 space station was put into orbit seven years ago as a prototype for China's ambitious space program.
