Dr. Ryder worked at the NASA Johnson Space Center in the Lunar Curatorial Facility for Northrup Services Inc. From 1978 to 1982 he helped assembled catalogs and guides to the Apollo lunar samples.
Dr. Ryder worked at the NASA Johnson Space Center in the Lunar Curatorial Facility for Northrup Services Inc. Since 1983 he was a staff scientist at the Lunar & Planetary Institute in Houston, Texas. He assembled catalogs and guides to the Apollo lunar samples.