1915 in science
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1915 in science and technology

See also: 1914 in science, other events of 1915, 1916 in science and the list of years in science.

Astronomy

• Pluto is photographed for the first time but was not recognized as a planet
• Einstein's new theory of general relativity used to explain Mercury's strange motions that baffled Urbain Le Verrier

Geology

• Alfred Wegener proposes the theory of Pangea

Physics

• Albert Einstein publishes his theory of general relativity.
• Arnold Sommerfeld develops a modified Bohr atomic model with elliptic orbits to explain relativistic fine structure

Technology

• George Claude patents the neon discharge tube for use in advertising
• NACA, the predecessor of NASA founded

Nobel Prizes

• Sir William Henry Bragg and Sir William Lawrence Bragg are awarded the Nobel Prize for Physics
• Richard Martin Willstätter is awarded the Nobel Prize for Chemistry

Births

Deaths

• July 22 - Sir Sandford Fleming, Canadian engineer and surveyor known as the "father of time zones".

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