1638-39

Updated: January 2, 2026

It was, nevertheless, visible in 1603, when Bayer marked it in his catalogue with the Greek letter Omicron, and was watched, in 1638-39, through its phases of brightening and apparent extinction by a Dutch professor named Holwarda.

Agnes M. (Agnes Mary) Clerke - A Popular History of Astronomy During the Nineteenth Century: Fourth Edition