See also: 1638 in science, other events of 1639, 1640 in science, list of years in science.

Table of contents

1 Astronomy 2 Exploration 3 Births 4 Deaths

Astronomy

• November 24 - Jeremiah Horrocks observes the transit of Venus

• The Casiquiare canal, a river forming a natural canal between the Amazon River and Orinoco River basins, is first encountered by Europeans