1915
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Events
- World War I occurs during this year, and lasts from July 28, 1914 – November 11, 1918.
- March 3 - The "National Advisory Committee for Aeronautics," the predecessor of NASA, is founded in the United States.
- March 19 - Pluto is photographed for the first time, but is not yet classified as a planet.
- British physicist Sir Joseph Larmor publishes his observations on "The Influence of Local Atmospheric Cooling on Astronomical Refraction".
- Albert Einstein presents part of his Theory of General Relativity to the Prussian Academy of Sciences.
- Robert Innes discovers Proxima Centauri, the closest star to Earth after the Sun.
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