1741 in science

The year 1741 in science and technology involved some significant events.

Astronomy

August 29 – Pluto reached perihelion.
December 11 – a "Fire-ball" and explosion heard over southern England, about 11 a.m. "a countryman... saw a flash of Lightning Before he heard the Noise... The sound was double... a Ball of Fire... took its Course to the East... over Westminster... it divided into Two Heads left a Train of Smoke... which continued ascending for 20 minutes". The description is reminiscent of the Chelyabinsk meteor of 2013.
Anders Celsius establishes the Uppsala Astronomical Observatory.
Pehr Wilhelm Wargentin publishes his first paper on the moons of Jupiter, in the Acta of the Royal Society of Sciences in Uppsala.
Edmund Weaver publishes The British Telescope: Being an Ephemeris of the Coelestial Motions.

Johann Jacob Dillenius publishes Historia Muscorum, a significant work on cryptogams.

May – Vitus Bering sets out from Petropavlovsk-Kamchatsky to map the coasts of Siberia and Alaska.
July 15 – Alexei Chirikov sights land in Southeast Alaska. He sends some men ashore in a longboat, making them the first Europeans to visit Alaska.

Nicolas Andry publishes Orthopédie, giving a name to the discipline of orthopedics.

July 20 – Georg Wilhelm Steller, physician on Bering’s Second Kamchatka Expedition, becomes the first European naturalist to set foot on Alaskan soil, identifying many species for the first time, including Steller's jay. On the return voyage he discovers Steller's sea cow.