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NASA JPL Home California Institute of Technology Asteroid Watch NASA Scientists Find Moon, Asteroids Share History NASA and international researchers have discovered that Earth's moon has more in common than previously thought with large asteroids roaming our solar system.
ROSAT (short for Rö ntgen sat ellit, in German X-rays are called Röntgenstrahlen, in honour of Wilhelm Röntgen ) is a defunct German Aerospace Center -led satellite X-ray telescope , with instruments built by Germany, the UK and the US. It was launched on 1 June 1990, on a Delta II rocket from Cape Canaveral , on what was initially designed as an 18 month mission, with provision for up to 5 years of operation. ROSAT actually operated for over 8 years, finally shutting down on 12 February 1999. ROSAT is expected to re-enter the Earth's atmosphere between October 21 and 23 2011. In February 2011, it was reported that the 2,400 kg satellite was unlikely to burn up entirely while re-entering the earth atmosphere due to the large amount of ceramics and glass used in construction.