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About AOA

AOA Mastin Observatory


In 1998, a beautiful Schmidt-Cassegrain telescope was donated to AOA by a student’s family.  A science teacher at that time, Barb Caseau, determined that this telescope would need to be housed in an observatory to best utilize its learning potential.  She was able to secure funds from an environmental science grant donated to AOA by Dr. Mastin.  The Mastin Observatory was built with these funds in 2000 and was used for many years by Barb Caseau for her astronomy classes.  In 2017, the observatory and telescope needed some repair.  A student, with a love for astronomy, asked her family to donate the necessary funds to clean and upgrade the observatory.  With the support of teachers and administrators, this student was the driving force behind the improvements and eventual opening of the observatory for monthly outdoor observing sessions.

The year 2020 marks the twentieth anniversary of the construction of the observatory on AOA’s campus.  An anniversary celebration is currently being planned for all astronomy enthusiasts and supporters.  There are also plans to start an astrophotography club.
Inside the Dome

10” Meade Schmidt-Cassegrain f6.3 Polar Mounted Telescope and 8” Meade Newtonian Reflector

ZWO ASI224MC and Canon EOS/Rebel DSLR
2021 Outdoor Observing Sessions

These sessions are open to people of all ages within the AOA community and the surrounding neighborhoods.

January 2021
  • 20th Anniversary Celebration
  • Join us virtually for this presentation on Zoom
  • Observatory open from 7:45 - 8:30 pm, weather permitting
February, 2021
  • How to use my telescope - 7:00 pm, Community Room
  • Bring your own telescope and ask questions about how to best utilize your equipment
  • Observatory open from 7:45 - 8:30 pm, weather permitting
March 2021
  • We finally have clear skies! The observatory will be open this Saturday night at 7pm. There will be a short presentation in the Osborne Building Community Room on the galaxies that will be visible that evening and then we will head out to the observatory to actually see them. This is an in-person event and masks must be worn at all times.

May 2021
  • Wednesday, May 12 will be our last public outdoor observing session for this school year.  We will begin this session with presentations about the Solar System by the 6th grade class.  If the skies are clear, we will then get a chance to view some planets through the telescope in the Mastin Observatory.  The presentations will begin at 7pm in the outdoor green space next to the Mastin Observatory.  All are welcome.


Andrews Osborne Academy

Grades PK - 12, PG
PHONE (440) 942-3600
AX (440) 942-3660
Located In Willoughby, OH, Andrews Osborne Academy is a Private Co-ed Day & Boarding College Preparatory School For Grades PK - 12, PG. Students benefit from a challenging academic program, fine and performing arts, competitive athletics, and a wide selection of extracurricular activities.