Huygens was a Dutch scientist. He lived from 1629-1695. He proposed the earliest theory about the nature of light, a phenomena that puzzled scientists for hundreds of years. His improvements on the telescope allowed him to make the first observations of Saturn's rings and to discover its moon, Titan.
CARL SAGAN
Sagan was an American astronomer. He lived from 1934-1996. He may not have been a great scientist in comparison to others, but he is one of the most famous astronomers. Sagan not only made important scientific studies in the fields of planetary science, he also managed to popularize astronomy more than any other individual. His charismatic teaching and boundless energy impacted people around the world as he broke down complicated subjects in a way that interested television viewers even as he educated them.
STEPHEN HAWKING
Stephen Hawking was born in 1942. He has made many significant insights into the field of cosmology. He proposed that, as the universe has a beginning, it will likely also end. He also suggested that it has no boundary or border. Despite being viewed as one of the most brilliant minds since Einstein, many of Hawking's books and lectures are steered toward the general public as he seeks to educate people about the universe they live in.
GIOVANNI CASSINI
CASSANI was an Italian astronomer.he lived from 1625-1712. He measured how long it took the planets Jupiter and Mars to rotate, as well as discovering four moons of Saturn and the gap in the planet's rings. When NASA launched a satellite to orbit Saturn and its moons in 1997, it was fittingly named Cassini.
EDMOND HALLEY
Halley was a British scientist who lived from 1656-1742. He was the one who reviewed historical comet sightings and proposed that the comet which appeared in 1456, 1531, 1607, and 1682 were all the same, and would return in 1758. Although he died before its