1639 Transit of Venus

Eyre Crowe’s 1882 painting of Horrocks observing the 1639 transit of Mercury. (Liverpool Art Museums/The Walker)

Hevelius’s 1662 publication on the 1639 transit of Venus and on transits of Mercury (Courtesy of Owen Gingerich)

Frontispiece of Hevelius’s 1662 publication on the 1639 transit of Venus and on transits of Mercury. (Courtesy of Owen Gingerich)

Frontispiece of Hevelius’s 1662 publication on the 1639 transit of Venus and on transits of Mercury. (Courtesy of Owen Gingerich)