Senate Faculty

Josh bloom 660×745 cropped

Joshua Bloom

Professor of Astronomy; Astronomy Department Chair

203 Campbell Hall


Specialty areas

Astrophysics, Black hole transients, Gamma-ray bursts, Optical/infrared instrumentation, Supernovae, Virtual observatory.

Research Interests

Josh is an astronomy professor at the University of California, Berkeley teaching radiative processes, high-energy astrophysics, astronomy data lab, and a graduate-level “Python for Data Science” course. He has published over 300 refereed articles largely on time-domain transients events, artificial intelligence, and telescope/insight automation. His book on gamma-ray bursts, a technical introduction for physical scientists, was published by Princeton University Press. Josh has been awarded the Data-Driven Discovery prize from the Gordon and Betty Moore Foundation and the Pierce Prize from the American Astronomical Society; he is also a former Sloan Fellow, Junior Fellow at the Harvard Society, and Hertz Foundation Fellow. He was co-founder and CTO of, an AI application startup, acquired by GE in 2016.


Bloom received a PhD in Astronomy and Astrophysics from Caltech in 2002 after receiving an M. Phil in Astronomy in 1997 from Cambridge University, England. He graduated from Harvard College magna cum laude with a double AB in Astronomy & Astrophysics and Physics. He is a Sloan Research Fellow.