...Hot plasma in interstellar space can now also be studied with X-rays. Since the first artificial satellite dedicated to X-ray astronomy, UHURU (USA), was launched at the end of 1970, five or six small astronomy satellites, including SAS-3 (USA) and Ariel-5 (UK), conducted observations in the 1970s, and two large satellites weighing 2 to 3 tons, HEAO-1 and HEAO-2 (known as the Einstein satellites), were in operation at the end of the 1970s. As of early 1983, the only two X-ray astronomy satellites still continuing observations are Hakucho and Tenma, operated by the Institute of Space and Astronautical Science in Japan. ... *Some of the terminology that mentions "SAS (artificial satellite)" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…星間空間の熱いプラズマもX線で調べられるようになっている。 1970年末,初めてX線天文専門の人工衛星ウフルUHURU(アメリカ)が打ち上げられて以来,70年代にはSAS‐3(アメリカ),エアリエルAriel‐5(イギリス)などを含む5~6個の小型天文衛星が観測し,70年代末にはHEAO‐1,HEAO‐2(アインシュタイン衛星と呼ばれる)2個の重量2~3tの大型衛星が働いた。83年初頭に観測を続けているのは,日本の宇宙科学研究所による〈はくちょう〉〈てんま〉の2個のX線天文衛星だけである。… ※「SAS(人工衛星)」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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