LGM-1とは 意味・読み方・使い方

Little green men 1 (LGM-1) was the explanation given to a certain astronomical observation. In 1967, a radio signal was detected in a UK observatory by Jocelyn Bell and Antony Hewish. The signal had a 1.3373 second period and 0.04 second pulsewidth. It originated at celestial coordinates 19:19 right ascension, 21 degrees declination. It was detected by individual observation of miles of graphical data traces. Due to its almost perfect regularity, it was at first assumed to be spurious noise, but this hypothesis was promptly discarded. After that, the discoverers proposed an alternative explanation that the signal might be a beacon or a communication from an intelligent extraterrestrial civilization and named it LGM-1 (LGM = "Little Green Men").