1779 in science

	… 1769; 1770; 1771; 1772; 1773; 1774; 1775; ; 1776; 1777; 1778; 1779; 1780; 1781; 1782; ; 1783; 1784; 1785; 1786; 1787; 1788; 1789 …;
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The year 1779 in science and technology involved some significant events.

Astronomy

March 23 – Edward Pigott discovers the Black Eye Galaxy (M64).
May 5 – The spiral galaxy M61 is discovered in the constellation Virgo by Barnabus Oriani.

Étienne Bézout publishes Théorie générale des équations algébriques in Paris, containing original work on elimination theory.

Jean-Paul Marat publishes Découvertes de M. Marat sur le feu, l'électricité et la lumière (Discoveries of Mr Marat on Fire, Electricity and Light).

January 8 – Bryan Higgins is granted a British patent for hydraulic cement (stucco) for use as an exterior plaster.^[1]
May – Boulton and Watt's Smethwick Engine is brought into service for pumping on the Birmingham Canal Navigations; two centuries later it will become the oldest working steam engine in the world.
James Pickard first applies a crank and flywheel to a Newcomen atmospheric engine to produce circular motion.
The Iron Bridge is erected across the River Severn in Shropshire, England; the first all-cast-iron bridge ever built.^[2] It will open to traffic on January 1, 1781.^[3]
The spinning mule is perfected by the Lancashire inventor Samuel Crompton.^[3]
The British Royal Navy adopts the carronade.
The Girandoni Air Rifle is designed in Austria.

January 5 – General Zebulon Pike, American explorer (died 1813)
May 1 – Alexander Morison, Scottish physician and psychiatrist (died 1866)
August 7
- Jöns Jacob Berzelius, Swedish chemist (died 1848)
- Louis de Freycinet, French explorer of coastal regions of Western Australia (died 1842)