WorldCat Identities

Spencer, John R. (John Robert) 1957-

Works: 6 works in 29 publications in 2 languages and 1,380 library holdings
Genres: Observations  Directories  Abstracts 
Roles: Editor
Classifications: QB723.S56, 523.64
Publication Timeline
Publications about  John R Spencer Publications about John R Spencer
Publications by  John R Spencer Publications by John R Spencer
Most widely held works by John R Spencer
The great comet crash : the impact of comet Shoemaker-Levy 9 on Jupiter ( Book )
7 editions published in 1995 in English and held by 919 WorldCat member libraries worldwide
Io after Galileo a new view of Jupiter's volcanic moon by Rosaly M. C Lopes ( )
17 editions published between 2006 and 2007 in English and German and held by 440 WorldCat member libraries worldwide
Reviews the basics about Io and it's space environment. This book includes various subjects, where the Galilio mission shed light on, with emphasis on several of Io's characteristics including it's active volcanism. It is intended for planetary scientists and volcanologists in general, and newcomers wishing to specialize in this field of research
Holographic information storage and retrieval by John R Spencer ( Book )
1 edition published in 1975 in English and held by 14 WorldCat member libraries worldwide
Directory of commercial microfilm services in the United Kingdom by National Reprographic Centre for Documentation ( Book )
1 edition published in 1976 in English and held by 5 WorldCat member libraries worldwide
The surfaces of Europa, Ganymede, and Callisto an investigation using Voyager IRIS thermal infrared spectra by John R Spencer ( )
2 editions published in 1987 in English and held by 2 WorldCat member libraries worldwide
Ganymede and Callisto subsolar temperatures are 10(DEGREES)K and 5(DEGREES)K respectively below equilibrium values. Equatorial nighttime temperatures are between 100(DEGREES)K and 75(DEGREES)K, Callisto and Europa being colder than Ganymede. The diurnal temperature profiles can be matched by 2-layer surfaces that are also consistent with the eclipse cooling observed from earth, though previous eclipse models underestimated thermal inertias by about 50%. Substrate thermal inertias in the 2-layer models are a factor of several lower than for solid ice. These are 'cold spots' on Ganymede and Callisto that are not high-albedo regions, which may indicate large thermal inertia anomalies
NRCd micrographics abstracts by National Reprographic Centre for Documentation ( Book )
1 edition published in 1974 in English and held by 0 WorldCat member libraries worldwide
Audience Level
Audience Level
  Kids General Special  
Audience level: 0.43 (from 0.00 for NRCd micro ... to 1.00 for The surfac ...)
Alternative Names
Spencer John R. 1957-....
Spencer, John Rason
Spencer, John Robert
English (27)
German (2)