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1838 in science : ウィキペディア英語版 | 1838 in science
The year 1838 in science and technology involved some significant events, listed below. ==Astronomy==
* Friedrich Wilhelm Bessel makes the first accurate measurement of distance to a star, 61 Cygni, using parallax. Thomas Henderson (Alpha Centauri) and Friedrich Georg Wilhelm Struve (Vega) announce their measurements using parallax shortly afterwards. * Claude Servais Mathias Pouillet makes the first quantitative measurements of the heat emitted by the Sun. * Peter Andreas Hansen publishes a revision of the lunar theory, ''Fundamenta nova investigationis orbitae verae quam luna perlustrat''.
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