Great Moments in Science
Eratosthenes measures the Earth in 240 BCE
Hipparchus measures the distance to the Moon in 189 BCE
Galileo looks through the telescope in 1610.
Newton realizes the Moon is falling, 1664.
Rømer and the speed of light, 1672.
Bouguer fails to weigh the Earth, 1739.
The transits of Venus and the size of the solar system, 1769.
Cavendish weighs the Earth, 1797.
Maxwell discovers that light is electromagnetic waves in 1862.