Yun Wang is an associate professor of physics and astronomy at the University of Oklahoma in Norman.

Ina Sarcevic is a physics professor at the University of Arizona in Tucson and author of The Edge of Infinity. Read an article she wrote on the fundamental nature of matter.

Barbara Sue Ryden is an associate professor of astronomy at Ohio State University in Columbus, author of Introduction to Cosmology and co-author of Basic Astrophysics (2008).

Christopher S. Kochanek is an astronomy professor and Ohio Eminent Scholar in Observational Cosmology at Ohio State University in Columbus. He is an expert in cosmology.

Marco Cavaglià is assistant professor of physics and astronomy at the University of Mississippi in Oxford. His research interests include cosmology, string and M-theory cosmology, and quantum cosmology.

John F. Hawley is a professor and chairman of the astronomy department at the University of Virginia in Charlottesville. He co authored Foundations of Modern Cosmology (2nd edition, 2005).

John P. “Jack” Hughes is a professor of physics and astronomy at Rutgers, The State University of New Jersey, in Piscataway. He teaches courses on cosmology and astrophysics and can talk about the formation of galaxies.

Richard F. Holman is a physics professor at Carnegie Mellon University in Pittsburgh. He specializes in the intersection between cosmology and particle physics.

Priyamvada Natarajan is an associate professor in the departments of astronomy and physics at Yale University in New Haven. She studies cosmology and galaxy evolution.