June 4th Instructor:
Tom Calderwood is head of the AAVSO Photoelectric Photometry Observing Section. He observes from Central Oregon, and is the author of "The Great Dimming of Betelgeuse" in the March 2021 issue of Sky and Telescope. A graduate of MIT in mathematics, he is a retired software engineer who worked on parallel processing computers, communication networks, video games, and the data system for the Chandra X-ray Observatory.
May 7th Instructor:
is a very active professor emeritus in Astronomy & Astrophysics and Science Education at the University of Toronto. He has served as president of six national or international science and education organizations, including the IAU Commission on Variable Stars and the AAVSO (1989-1991). He has been an AAVSO member for over 40 years. He edited JAAVSO for 10 years, and continues to serve as co-advisor to the Long-period Variable (LPV) section. His many awards include the AAVSO Merit Award and W.T. Olcott Award.
April 2nd Instructor:
is an assistant professor in theoretical astrophysics at the California Institute of Technology. He uses asteroseismology to study the structure and evolution of all types of stars, including Sun-like stars, red giants, massive stars, white dwarfs, and even the planet Saturn.
March 5th Instructor:
has done stellar photometry since the days of photomultiplier tubes, but more recent was programmer for the science-oriented software Astronomical Image Processing for Windows (AIP4Win). In a recent foray into photometry, Richard and two high school students in Wilsonville, OR did photometry on 25,000 images of the pulsating star XX Cygni to derive 23 new accurate times of maximum light. They presented their results during the AAVSO 109th Annual Meeting.
February 5th Instructor:
(also recognized as AAVSO observer EHEA) is the co-lead, alongside Dave Hinzel, of AAVSO's High Energy Network (HEN) Observing Section. In his day job, he works as a software engineer for the Max Planck Institute for Gravitational Physics in Hannover, Germany.