Universe & space

Kepler's Supernova appears in the constellation Ophiuchus

October 1604

In early October 1604 observers across Europe noticed a brilliant new star in Ophiuchus, close to Jupiter and Mars. Johannes Kepler followed it from 17 October until it faded from view in 1606, and described it in his book De Stella Nova. Galileo also used it in lectures to argue that the heavens could change. It remains the last supernova seen in our own Milky Way with the naked eye, and its remnant is still studied in X-rays and radio waves. The event ended the belief of many scholars that the heavens never change.

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This moment belongs to the Early modern world (1500 CE to 1760 CE), voyages, printing and new ideas. You can also browse everything in the 17th century.