...A project to detect the existence of intelligent life outside of Earth through radio exploration. Based on physical and astronomical considerations, P. Morrison and G. Cocconi believed that such intelligence was communicating into space at wavelengths close to the 21 cm (1420 MHz) hydrogen line. In 1960, F.D. Drake of the National Radio Astronomy Observatory of the United States followed this idea and observed the solar-like stars Tau Ceti and ε Eridanus, which are relatively close to the Sun, for a total of 150 hours over a period of two months. ... *Some of the terminology that mentions "Morrison, P." is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…地球外に知的生物がおり,電波探査によってその存在を検出しようとした計画。物理学的・天文学的考察から,このような知性は,波長21cm(周波数1420MHz)の水素線の近傍の波長で宇宙空間へ向けて通信を行っているとモリソンP.MorrisonとココーニG.Cocconiは考えた。1960年,アメリカ国立電波天文台のドレークF.D.Drakeは,この考えに従って太陽の比較的近傍にあって,太陽類似の,くじら座τ星とエリダヌス座ε星を2ヵ月にわたって延べ150時間あまり観測した。… ※「Morrison,P.」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 |
...life cycle is complex, with some species repro...
This was a position established during the Edo Sh...
...Population: 107,800 (1995). German name: Liegn...
〘Noun〙 (formerly also "zenshi" or "...
A group of privileged long-distance traders who em...
Water saturated with chlorine. Chlorine dissolves...
Born: July 16, 1897. Died May 17, 1984. Chinese cr...
...As a result of improvements in hygiene and med...
…In the midst of this crisis, on February 12, the...
Born: January 2, 1894, New York [Died] May 25, 198...
Poet. Born in Otaru, Hokkaido. After graduating f...
…Greeks active in northwestern India from the 2nd...
A measuring instrument that precisely measures th...
A passerine bird of the family Emberizidae (illust...
During the Qing Dynasty in China, the term was us...