In 1972 he received his doctorate at George Abell in astronomy at the University of California, Los Angeles ( UCLA). From 1972 he was at the (1935 established ) Griffith Observatory in Los Angeles, first in 1970 as a part-time lecturer, from 1972 as curator and 1974 as a director. He popularized astronomy in numerous papers ( he writes for Sky & Telescope ), lectures ( including in the framework of programs of his observatory ), books and on television. Particularly widespread his books and research on archaeoastronomy are ( he traveled more than 1,800 archäoastronomische sites). He also writes astronomy books for children.
For his popular scientific contributions, he was honored with several prizes. In 1989 he received the Klumpke - Roberts Award of the Astronomical Society of the Pacific, 1996, the G. Bruce Blair Medal of the " Western Amateur Astronomers " and the 2002 Clifford W. Holmes Award.
- Publisher: In search for ancient astronomies, Doubleday 1977, McGraw Hill Paperback 1979, Oxford University Press 1994, Dover 2003
- Archaeoastronomy and the Roots of Science, Westview Press 1984
- Beyond the Blue Horizon - Myths and Legends of the Sun, Moon, Stars, and Planets, Oxford University Press 1992
- Skywatchers, Shamans and Kings: Astronomy and the Archaeology of Power, 1997