Here’s a look at the life of renowned theoretical physicist, cosmologist, astronomer and mathematician, Stephen Hawking. Personal Birth date: January 8, 1942 Death date: March 14, 2018 Birth place: ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...