1590 in science

	… 1580; 1581; 1582; 1583; 1584; 1585; 1586; ; 1587; 1588; 1589; 1590; 1591; 1592; 1593; ; 1594; 1595; 1596; 1597; 1598; 1599; 1600 …;
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The year 1590 in science and technology involved some significant events.

Optics

Glass lenses are developed in the Netherlands and used for the first time in microscopes and telescopes.
A compound microscope is developed by Zacharias Janssen and his father in the Netherlands.

approx. date – Giovanni Battista Zupi, Italian astronomer (died 1650)
- Marie Fouquet, French medical writer (died 1681)