The year 1611 CE in science and technology included many events, some of which are listed here.

See also: 1610 in science, other events of 1611, 1612 in science and the list of years in science.

Astronomy

• Sunspots are first observed telescopically by Frisian astronomers Johannes and David Fabricius; their discovery is overlooked however, and the first sighting is claimed a few months later by Galileo Galilei and Christoph Scheiner

Births

• January 28 - Johannes Hevelius, German astronomer (died 1687)

Deaths

• Henry Hudson, English explorer (born c1565)