How did Kepler's work build upon the theories of Copernicus? O Kepler proved that planets move in circular orbits around the sun.
O Kepler demonstrated that more planets existed in the solar system.
O Kepler added to the theory that planets move in orbits around the sun.
O Kepler showed that gravity exists and draws objects toward one another.

C

Explanation:

Through Brahe's astronomical measurements and Kepler's own drawings of the geometrical relationship between the Sun and Mars in various parts of the planet's orbit, Kepler discovered that planets moved faster when they were closer to the Sun.

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on

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