First Microscope Created in the Netherlands.
Barometer (early 1600s, Italian) - measure air pressure
Francois Vieta introduces signs for addition, subtraction, multiplication, and division.
Kepler discovers first law of planetary motion.
Galileo plots the speed of a rolling ball on a time axis.
Telescope (1608, Dutch) A Dutch glass maker construced a primitive telescope. Galileo heard about it and improved on the design.
Galileo develops his first telescope
Galileo Galilei publishes his The Starry Messenger, (Siderial Messenger, from Siderius Nuncius, 1610). It speaks of Galileo's first observations of the moon, the stars, and jupiter as seen through a telescope. The first publication to utilize telescopic observations.
Thermometer (1611) for chemical and medical studies
Galileo published his The Letters on Sunspots. Suggests that the sun and heavens alike are corruptible.-Padua, Italy