Adams, John Couch (1819-1892), a British astronomer, one of the discoverers of the planet Neptune. From his study of the planet Uranus, Adams was able to calculate mathematically the existence of Neptune in 1845. Urbain Leverrier made the same discovery independently in 1846. Adams also determined the orbit of the Leonid meteors (swarms of meteors that appear each November) and studied the earth's magnetism and the moon's motions. Adams was professor of astronomy and geometry at Cambridge University, 1858-92.
The man immortalized on the left was behind the three laws of motion and the universal law of gravitation. He was also competitive, temperamental and fascinated with alchemy. How well do you know Newton?
He is famous for a phrase he never said, for wearing turtlenecks and for hosting the original 'Cosmos' TV series. As enthusiastic about the stars as he was about marijuana, Carl Sagan led a very surprising life. Here are 10 cool facts.