UK Daily Mail 
October 10, 2011
Earth has been told to brace for a possible satellite collision as an orbiting telescope weighing nearly three tons has spun out of control and is plummeting homewards.
ROSAT, a German X-ray telescope built with British and American technology, has been orbiting the Earth since 1990 and has provided invaluable data on stars. But they lost contact with is in 1999.
It is now predicted to re-enter Earth’s atmosphere at the end of this month.