1909 in science
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See also:
Other events of 1909
List of years in science
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1908 in science
1909 in science
1910 in science
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The year 1909 in science and technology included many events, some of which are listed below.
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Archeaology
- Discovery of the Burgess Shale Cambrian fossil site
Astronomy
- Comet Halley first becomes visible on a photographic plate.
Geology
- Ernest Shackleton's expedition finds the magnetic South Pole.
Physics
- Albert Einstein together with Marcel Grossmann starts to develop a theory which would bind metric tensor gik, which defines a space geometry, with a source of gravity, that is with mass
- Hans Geiger and Ernest Marsden discover large angle deflections of alpha particles by thin metal foils
- Ernest Rutherford and Thomas Royds demonstrate that alpha particles are doubly ionized helium atoms
Medicine
- Karl Landsteiner develops system of blood groups.
Technology
- Leo Baekeland presents the Bakelite hard thermosetting plastic
- Einar Dessau uses a short-wave radio transmitter becoming the first to broadcast as a ham radio operator.
- Louis Bleriot is the first man to fly across the English Channel in a heavier-than-air craft.
Awards
Births
- January 5 - Stephen Cole Kleene (d. 1994), mathematician.
- April 13 - Stanislaw Marcin Ulam (d. 1984), mathematician.
- May 7 - Edwin H. Land (d. 1991), inventor and founder of Polaroid.
- November 24 - Gerhard Gentzen (d. 1945), mathematician.
- Giulio Racah (d. 1965), Israeli mathematician and physicist.
Deaths
- January 12 - Hermann Minkowski (b. 1864), mathematician.
- July 11 - Simon Newcomb (b. 1835), astronomer.
- August 27 - Emil Christian Hansen (b. 1842), fermentation physiologist.