1575 in science

Astronomy

• Cornelius Gemma is credited with publishing the first scientific illustration of the aurora, in his discussion of the 1572 supernova.

  Geology

• December 16 – Valdivia earthquake in Chile.

  Mathematics

• Guilielmus Xylander uses parallel vertical lines to indicate equality.

  Medicine

• First publication of Ambroise Paré's collected works, Les oeuvres de M. Ambroise Paré, in Paris, including some of the earliest descriptions of forensic medicine.

  Publications

• Cornelius Gemma publishes De naturae divinis characterismis in Antwerp.

  Deaths

• Tomás de Mercado, Spanish economist and theologian