which type of telescope uses grazing incidence?
EXOSAT remained in orbit from 1983 to 1986. A much larger X-ray astronomy satellite was launched on June 1, 1990, as part of a cooperative program involving the United States, Germany, and the United Kingdom. This satellite, called the RÃ¶ntgensatellit (ROSAT), had two parallel grazing-incidence telescopes. One of them, the X-ray telescope, bore many similarities to the equipment of the Einstein Observatory but had a larger geometric area and better mirror resolution. The other operated at extreme ultraviolet wavelengths.