Extraterrestrial observation

Japanese: 大気圏外観測 - たいきけんがいかんそく
Extraterrestrial observation
Going outside the Earth's atmosphere to observe various phenomena in space. The Earth is surrounded by a layer of air that weighs 1 kg per square centimeter. This atmosphere, which is necessary for our survival, acts as a thick wall that absorbs most of the electromagnetic waves from outer space. Outside this atmospheric wall, a plasma wind blows from the sun. Since the 1950s, humans have used balloons to send observation equipment high into the atmosphere, as well as sounding rockets and, since 1957, artificial satellites to go outside the atmosphere and learn what is happening outside space.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
地球大気の外に出て宇宙のさまざまな現象を観測すること。地球は1cm2当り1kgに及ぶ空気の層につつまれている。われわれが生きるために必要なこの大気は外の宇宙からくる電磁波のほとんどを吸収してしまう厚い壁になっている。この大気の壁の外には太陽からプラズマの風が吹きつけてきている。1950年代以降人類は気球を使って大気の高いところに観測装置を上げたり,観測ロケットや57年以降は人工衛星を使って大気圏外に出て宇宙の外で何が起きているかを知るようになった。

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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