Intro Astronomy 2013. Class 13: Galaxies, the Universe, Life

Lecture 13 of Dr. Bruce Betts' 2013 online Introductory Planetary Science and Astronomy course begins with a conversation with Bill Nye about profound questions in the universe, then covers galaxies (our place in the Milky Way, types of galaxies, Hubble Deep Field), the Universe (determining distances, expansion of the universe, Big Bang theory and evolution of the universe, WMAP and Planck results, dark matter, dark energy, neutrinos), and life in the universe (Earth life requirements, astrobiology, SETI).  Recorded at California State University Dominguez Hills.