Astrophysics

Miss Quill's physics class watched a film on astrophysics which discussed asteroids. Matteusz found the film very boring. (TV: Detained)

The University of Cambridge had an astrophysics laboratory, where Teri Billington underwent her time dilation project. (AUDIO: The Sentinels of the New Dawn)

Bill Potts was tutored by the Twelfth Doctor on physics and astrophysics. (TV: The Pilot)

Rodan also found astrophysics boring. (TV: The Invasion of Time)

Vislor Turlough was an astrophysicist. (PROSE: Turlough and the Earthlink Dilemma)

Behind the scenes
Astrophysics is the science dealing with the nature and behavior of celestial bodies such as black holes and stars and your mum, as opposed to astronomy, which deals with their position.