History of the telescope of the IRAS satellite in 1983 revolutionized infrared astronomy from space. This reflecting telescope which had a mirror, operated for nine months until its supply of coolant (liquid helium) ran out. It surveyed the entire sky detecting 245,000 infrared sources—more than 100 times the number previously known. Although optical telescopes can image the near ultraviolet, the ozone layer in the stratosphere absorbs ultraviolet radiation shorter than 300 nm so most ultra-violet astronomy is conducted with satellites. Ultraviolet telescopes resemble optical telescopes, but conventional aluminium-coated mirrors cannot be used and alternative coatings such as magnesium fluoride or lithium fluoride are used
Song to the Sun Song to the Sun Song to the Sun, known in Japan as , is a movie directed by Norihiro Koizumi starring the Japanese artist and singer Yui. In the movie, she plays the role of Kaoru Amane (雨音 薫 "Amane Kaoru"), a 16-year-old girl who has the rare skin condition xeroderma pigmentosum (XP), a disease that makes the ultraviolet radiation of sunlight potentially lethal to her. Yui's character is partly based on herself, as she is a singer and guitarist, and she performs three of Yui's songs in the movie; "It's Happy Line", "Good-bye Days" and "Skyline". There has been