Steven Gullbergholds a Ph.D. in astronomy from James Cook University (Australia) and is a Professor of Cultural Astronomy at the University of Oklahoma (USA), where he is Lead Faculty for the School of Integrative and Cultural Studies. He also serves as President of Commission C5 Cultural Astronomy in the International Astronomical Union (IAU). He has conducted extensive field research on the astronomy of the Inkas in the Peruvian Andes and has written many research papers. He also is the author ofAstronomy of the Inca Empire: Use and Significance of the Sun and the Night Sky.At the University of Oklahoma, he led the development of an archaeoastronomy distance-learning program designed to educate researchers around the world. Dr. Gullberg is the Managing Editor of theJournal of Astronomy in Culture,and he as well is regularly invited to present papers at international conferences as he endeavors to globally advance the field of archaeoastronomy.

Milton Rojas Gamarraearned his PhD in Intercultural Education at the University of Santiago (Chile). His doctoral thesis was in archaeoastronomy and his Masters degree was in astrophysics. Milton is a Professor of Physics at the Universidad Nacional de San Antonio Abad del Cusco (Peru). Milton is a descendant of the original Quechua people and has dedicated himself to preserving their wisdom, their ethos, and their worldview. His first language is Quechua. Dr. Rojas Gamarra has studied the astronomy of the Inkas for more than 30 years and benefits greatly from the oral traditions that have been passed on to him by his grandparents and by hisAmauta, Emilio Huaman Huillca.