Talk:Upcoming ERB suggestions/@comment-24408988-20140203041214/@comment-5613009-20140203042529

Also, in case of Tyson, he indeed was an astrophysicist, which branched out from the astronomy itself. Astronomy studies the laws that may govern the whole universe- trying to figure out an equation that puts the universe together using methods such as chemistry, physics, at cetera. Astrophysicists, however, studies the universe by using physics- such as physical property of a planet, et cetera. Tyson also is a cosmologist, which is different from astronomers as they study the universe as a whole, not by which laws govern them.

The reason Carl Sagan is most suitable if Tyson would be used in a battle because Sagan himself also is an astrophysicist. They have the closest connection as two astrophysicists who study the universe in depth.