EditorialThe Astronomicum Caesareum, from 1540, considered one of the spectacular books of its period, open to a page showing a rotating paper disk that traces celestial motion, part of "Treasures," a permanent exhibition at the New York Public Library's flagship branch, Dec. 20, 2021. (Vincent Tullo/The New York Times)
EditorialThe Astronomicum Caesareum, from 1540, considered one of the spectacular books of its period, open to a page showing a rotating paper disk that traces celestial motion, part of "Treasures," a permanent exhibition at the New York Public Library's flagship branch, Dec. 20, 2021. (Vincent Tullo/The New York Times)