The first recorded observation from Earth of the Great Comet of 1577 takes place by Aztec astronomers in Mexico, followed by reports from Italy on November 7 and Japan on November 8. Astronomer Tycho Brahe will track the comet from November 13 until January 26 before it departs the Solar System.

The Great Comet of 1577 is a non-periodic comet that passed close to Earth with first observation being possible in Peru on 1 November 1577. Final observation was made on 26 January 1578.

November 6 is the 310th day of the year in the Gregorian calendar; 55 days remain until the end of the year.

Tycho Brahe, generally called Tycho for short, was a Danish astronomer of the Renaissance, known for his comprehensive and unprecedentedly accurate astronomical observations. He was known during his lifetime as an astronomer, astrologer, and alchemist. He was the last major astronomer before the invention of the telescope. Tycho Brahe has also been described as the greatest pre-telescopic astronomer.