Anja Cetti Andersen is an astrophysicist at the Niels Bohr Institute in Copenhagen. She has previously been associated with the Nordic Institute of Theoretical Physics, but is now affiliated with the University of Copenhagen, Dark Cosmolgy Centre. Her primary field of research is the thermal, dynamic, and chemical role of cosmic dust in star processes. In this context, she is responsible for the "Cosmic Dust" project.

Anja C. Andersen is a very active facilitator of astronomical research, and has published several scientific books. In addition, she has participated in several radio and television broadcasts. She received 2006 P1s Rosenkjær the prize, and in the spring of 2007 she acknowledged with a lecture series "Star Dust and Galaxies".