Anna Frebel (born 1980 in Berlin) is a German astronomer and author working on discovering the oldest stars in the universe.

Shortly thereafter, a W. J. McDonald Postdoctoral Fellowship brought her to the University of Texas at Austin in 2006, where she continued her studies.

[2] From 2009 to 2011, she was a Clay Postdoctoral Fellow at the Harvard–Smithsonian Center for Astrophysics in Cambridge (MA).

In 2012 she moved to Massachusetts Institute of Technology, achieving promotion to full professor in 2022.

In 2007 she also discovered the red giant star HE 1523-0901, which is about 13.2 billion years old.