Intro Astronomy 2017. Class 4: Moon, Mercury, Venus-Earth-Mars Atmospheres

Lecture 4 of Dr. Bruce Betts' online Introductory Planetary Science and Astronomy course covers the Moon, Mercury (characteristics, geology, core, exploration, water ice at poles), the Terrestrial Planet Atmospheres/Triad Planets -- a comparison of Venus, Earth, and Mars and why their atmospheres are so different, including discussions of the habitable zone, greenhouse effect, temperature systems (Kelvins, Celsius, Fahrenheit), and the carbon cycle. Recorded at California State University Dominguez Hills.