American astronomer, author, and writer who was the first person to convince the mainstream science that the Earth had once been hit by a planet sized body (Thea), creating both the moon and the Earth's 23° tilt. He also has an asteroid named after hi
American astronomer, astrophysicist, cosmologist, author, science popularizer, and science communicator in astronomy and natural sciences. Author. Host of the popular TV series Cosmos
Scientist; MIT; NASA. Principal investigator for the Gravity Recovery and Interior Laboratory (GRAIL) Mission (2011-2012); other planetary mission participation: NASA LRO, MRO, Dawn, NEAR, Mars Global Surveyor