Because astronomy science is yet more enthusiastics science, most astronomers are either physicists or mathematicians. Although there are astronomers in ancient times, a lot of their believes are obsolated after 15 century, when the idea of rotating planets around the sun became popular and the discovery of the optical telescope. Here are some notable ideas and classifications made by the astronomers chosen for this game, among thousand other astronomers.
1. Nicolaus Copernicus (14731543). A Polish mathematician and astronomer who made a model of the universe that placed the Sun rather than the Earth at the center of the universe.
2. Galileo Galilei (15641642). An Italian astronomer, physicist, engineer, philosopher, and mathematician, has been called the "father of observational astronomy".
3. Johannes Kepler (15711630) A German astronomer, best known for his laws of planetary motion.
4. Giovanni Cassini (16251712) An Italian astronomer who discovered four satellites of the planet Saturn and noted the division of the rings of Saturn.
5. Isaac Newton (16431727) English mathematician, astronomer, theologian, and physicist who is widely recognised as one of the most influential scientists of all time, and a key figure in the scientific revolution. Most famous for his work on forces, specifically gravity.
6. Edmond Halley (16561742) British scientist who reviewed historical comet sightings and proposed that the comet that had appeared in 1456, 1531, 1607, and 1682 were all the same.
7. Charles Messier (17301817) French astronomer who published an astronomical catalogue consisting of 110 nebulae and star clusters, which came to be known as the Messier objects.
8. Henrietta Leavitt (1868-1921) American astronomer who discovered the relation between the luminosity and the period of Cepheid variable stars.
9. Albert Einstein (18791955) German physicist who proposed a new way of looking at the universe that went beyond current understanding.
10. Edwin Hubble (18991953) American astronomer calculated that a small blob in the sky existed outside of the Milky Way.
11. Frank Drake (1930) American astronomer and astrophysicist. He is involved in the search for extraterrestrial intelligence, including the founding of SETI.
12. Stephen Hawking (19422018) English theoretical physicist, cosmologist, and author, who was director of research at the Centre for Theoretical Cosmology.