Market1503 in science
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1503 in science

The year 1503 in science and technology included many events, some of which are listed below.

Astronomy
• July 23 – Unknown at this time, Pluto moves outside Neptune's orbit, remaining there for 233 years. ==Exploration==
Exploration
• May 10 – Christopher Columbus first sights the Cayman Islands, which he names Las Tortugas after the numerous sea turtles there. ==Technology==
Technology
• April 21 – Battle of Cerignola: Spanish forces defeat the French, considered the first battle in history won by gunpowder small arms. • Giuliano da Sangallo constructs the city waIls of Arezzo in Tuscany using the new technology of bastions. ==Births==
Births
• December 14 – Nostradamus, French physician and astrologer (died 1566) ==References==
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