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1991 in science : ウィキペディア英語版 | 1991 in science
The year 1991 in science and technology involved many significant events, some listed below. ==Astronomy and space exploration==
* May 18 – Helen Sharman becomes the first British person in space, flying with the Soyuz TM-12 mission. As of 2011 she is the only British astronaut. * October 29 – The Galileo probe becomes the first spacecraft to visit an asteroid (951 Gaspra). * Asteroid 6859 Datemasamune is discovered by Masahiro Koishikawa. * 11514 Tsunenaga is discovered. * There are four lunar eclipses: three penumbral on January 30, July 26, and June 27, and one minor partial lunar eclipse on December 21. * There are two solar eclipses, one annular eclipse on January 15, and a very long total eclipse on July 11, lasting 6 minutes and 53 seconds.
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