Labels:text | screenshot OCR: X-RAY ASTRONOMY STUDIES OF X-RAYS in space are carried out by satellites or rockets. This is because the Earth is protected from this type of radiation by its atmosphere. X-rays come from extremely hot gases found in the remnants of supernovas, or from pairs of stars where one is a white dwarf or a black hole. As X-rays would pass through a conventional mirror, telescopes collecting them use an array of concentric, cylindrical mirrors, which reflect the rays at a shallow angle. Solar panel SKYLAB'S SUN Antenna This image was taken in 1973 from Skylab; the red parts of the image are solar flares, intense X-ray sources. ROSAT An international observatory, the Roentgen Satellite (ROSAT) was launched in 1990, to observe SEL X-ray sources in the sky. NEXT ALSO
