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1918 in science : ウィキペディア英語版 | 1918 in science
The year 1918 in science and technology involved some significant events, listed below. ==Astronomy==
* June 8 – Nova Aquila, the brightest observed since 1604, is discovered. * Kiyotsugu Hirayama identifies several groups of main belt asteroids, now known as Hirayama families. * Harlow Shapley demonstrates that globular clusters are arranged in a spheroid or halo whose center is not the Earth, but the center of the galaxy. * Max Wolf discovers the star Wolf 359. * Heber Curtis discovers a relativistic jet of matter emerging from Elliptical galaxy M87.
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