Astrolabe Team

Bryan Heidorn, PhD – Principal Investigator




P. Bryan Heidorn is the Director of the University of Arizona School of Information. Prior to coming to the UA, Heidorn was a faculty member of the Graduate School of Library and Information Science at the University of Illinois at Urbana-Champaign. For the last two years he also served as a program manager of the Division of Biological Infrastructure at the National Science Foundation. Bryan served in a number of posts including President, VP and Grants Committee Chair of the JRS Biodiversity Foundation ( which funds work in Africa and South America for biodiversity informatics projects for 7 years ending 2013. His areas of research include natural language processing, text mining for metadata and information retrieval, particularly in biodiversity literature, and museum informatics.




Julie Steffen – Principal Investigator, American Astronomical Society Director of Publishing and WorldWide Telescope Interim Project Director


Julie Steffen has been publisher of the American Astronomical Society’s flagship research journals, The Astronomical Journal, The Astrophysical Journal, The Astrophysical Journal Letters, and The Astrophysical Journal Supplements for over 20 of her 30-year career in publishing, first at The University of Chicago Press and since 2014 as the Director of Publishing at the American Astronomical Society. Julie’s responsibilities include innovation and community outreach, as well as management of AAS’s publishing partners, and its team of data scientists, highlights editors, and peer review support staff. She is currently co-PI of the Aesclepias Project, an Arthur P. Sloan Foundation funded initiative to enhance the discoverability and citability of astronomical software and is interim Project Director for the AAS’s World Wide Telescope.




Gretchen Stahlman – Graduate Associate, University of Arizona School of Information


Gretchen Stahlman is a Ph.D. Candidate in the University of Arizona’s School of Information where she is involved in scholarly communication and data curation in astronomy. Gretchen holds a M.S. in Library Science from Clarion University of Pennsylvania, and she brings more than 10 years of prior professional experience related to librarianship and document management for telescope construction.

Tom Hicks – Senior Research Programmer

Tom has a M.S. in Computer Science from the University of Arizona and an M.A. in Cognitive Science from Johns Hopkins University. He has been designing, developing, and teaching computer software for longer than he cares to admit in public.


Erik Enderlein – Software Developer