Dr. Thomas Greathouse of Southwest Research Institute will present the Physics Department seminar. He will present two topics: Part 1 is “Seasonal Temperature Variations in Saturn’s Stratosphere: Radiative Seasonal Model versus Observations;” Part 2 is “The Thermal Response to Waves Propagating Through Jupiter’s Middle Atmosphere.” Each portion of Dr. Greathouse’s talk will be followed by a brief Q&A session. 4 p.m. in Workman 101.