Bradley Observatory

The stars and the heavens, closer to earth. 

The Bradley Observatory (84° 17' 38.98" W, 33° 45' 54.84" N) brings the stars to the Atlanta area. The astronomical teaching and research facility is located on the Agnes Scott College campus in Decatur, Georgia. The observatory, named in honor of William C. and Sarah Hall Bradley, contains the 70-seat Delafield Planetarium and a 100-seat capacity lecture hall.

The building also contains a library/seminar room, two faculty offices, a darkroom, a student computer lab and an observing plaza for astronomical viewing. The large dome atop the observatory houses the 30-inch Lewis H. Beck telescope.

Astronomy Resources 

Bradley Observatory

Information Alert

Bradley Observatory at Agnes Scott College is closed due to the COVID-19 pandemic. 

For additional information, please contact Channon Weeks at

Bradley Observatory Store

The Southeastern Association for Research in Astronomy

Observatory Facilities

The Beck Telescope

The Beck Telescope is a 30-inch reflector. This 1930 vintage Cassegrain has a Warner & Swasey mounting with optical elements by J.W. Fecker. It was completely refurbished and modified for its installation in 1950 by the Perkin-Elmer Corporation. The telescope tracking control system was modernized and upgraded during the summer of 1998, and the mirrors were refinished during the renovations in 2000.

Optical Telescopes

The observatory contains eight Celestron Nexstar 4SE telescopes for use in Astronomy 120. A variety of Celestron and Meade 8-inch and 10-inch Schmidt-Cassegrain telescopes are used in Astronomy 120L and 200L. Astronomy 200L students also use the Bradley Radio Telescope (BrAT), a steerable 3.1 m diameter radio telescope with an L band (21 cm) receiver.

Delafield Planetarium

The Delafield Planetarium located in the Bradley Observatory seats 70 people. The Zeiss machine allows us to project stars, planets, constellation patterns, the sun and the moon onto the ceiling. The planetarium serves Agnes Scott students taking astronomy courses. It's also open to the public for monthly open houses and observatory group tours.

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