List of years in science (Table)
… 1632 • 1633 • 1634 • 1635 • 1636 • 1637 • 1638 •    1639 • 1640 • 1641 – 1642 – 1643 • 1644 • 1645 •    1646 • 1647 • 1648 • 1649 • 1650 • 1651 • 1652 …
Related time period or subjects
… 1639 • 1640 • 1641 – 1642 – 1643 • 1644 • 1645 … … 1610s • 1620s • 1630s – 1640s – 1650s • 1660s • 1670s … … 16th century – 17th century – 18th century …
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The year 1642 in science and technology involved some significant events.

Technology

• The printmaking process of mezzotint is developed by Ludwig von Siegen.
• The Pascaline, one of the earliest mechanical devices for calculating, is invented by Blaise Pascal to help with the recording of taxes.

Exploration

• Abel Janzoon Tasman, Dutch explorer, sights Tasmania, which he names Anthony Van Dieman's Land.

Births

Deaths

• January 8 - Galileo Galilei, astronomer (born 1564)