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さまざまな宇宙、空中現象の最新自動観測撮影装置ロボットSID-1(シドワン=Space Intrusion Detection systems-1)が捕らえた謎の現象や物体とUFO *撮影画像は、左下部のカテゴリーからSID-1~を選択(随時更新) *メディア、報道関係者の方へ:不思議な動画、静止画、解析画像多数有ります。情報、著作権等の権利は当観測所です。連絡先はプロフィール参照。

A History of SETI

1959-04-01 Wed 00:00

A History of SETI
1959 April
While interest in the question of extraterrestrial life is at least as old as historical civilizations, the modern SETI era can be defined as beginning in 1959. In that year, Cornell physicists Giuseppi Cocconi and Philip Morrison published an article in Nature in which they pointed out the potential for using microwave radio to communicate between the stars.

Frank Drake viriginia 1965A young radio astronomer, Frank Drake, had independently reached the same conclusion, and in the spring of 1960 conducted the first microwave radio search for signals from other solar systems. For two months Drake aimed an 85-foot West Virginia antenna in the direction of two nearby Sun-like stars. His single-channel receiver was tuned to the "magic" frequency of the 21 cm (1,420 MHz) line of neutral hydrogen, a spot on the radio dial also favored by Cocconi and Morrison because of its astronomical significance.

http://www.seti.org/node/662

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