thumb|Cover of the book "Treatise on Astronomy, and Cosmographia and Natural Philosophia," published by Juan Pérez de Moya in Alcalá de Henares, in 1573.
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The year 1573 in science and technology included many events, some of which are listed here.
Astronomy
- Tycho Brahe publishes De Stella Nova.
Medicine
- Publication of the Chirurgia Magna of Paracelsus, a translation into Latin of his work on surgery, Die grosse Wundartzney (1536), in Basel, allowing its wider dissemination throughout Europe.
Births
- January 10 – Simon Marius, German astronomer who named the Galilean moons of Jupiter (died 1624)
- July 25 – Christoph Scheiner, German astronomer who observed sunspots (died 1650)
- September 28 – Théodore de Mayerne, Swiss-born physician (died 1655)
Deaths
- April 29 – Guillaume Le Testu, French privateer, explorer and cartographer (born c. 1509)
- July 29 – John Caius, English physician and benefactor (born 1510)
