Home Van Allen Observatory Van Allen Observatory Welcome to the Van Allen Observatory website. The University of Iowa Department of Physics and Astronomy maintains these pages as a guide to the Van Allen Observatory (VAO) located on the roof of Van Allen Hall in downtown Iowa City. Events Astrophysics and Space Physics Seminar (301 VAN) - Professor Jasper Halekas; Department of Physics and Astronomy, University of Iowa Wednesday, March 22, 2023 3:30pm to 4:30pm Van Allen Hall A Simple, Astronomically-Based Calculation of Global Warming Climate Sensitivity, Part II Public Observing Night - Van Allen Observatories Friday, March 24, 2023 8:00pm to 10:00pm Van Allen Hall Join us for another public observing night at Van Allen Hall! Operator Theory Seminar (309 VAN) - Shrey Sanadhya, Ph.D.; Ben-Gurion University of the Negev Tuesday, March 28, 2023 1:30pm to 2:30pm Virtual Periodicity of joint-cotiles