Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983sciam.249...56j&link_type=abstract
Scientific American (ISSN 0036-8733), vol. 249, Dec. 1983, p. 56-67.
Physics
1
Io, Satellite Surfaces, Volcanoes, Calderas, Galileo Project, Gravitational Effects, Spaceborne Photography, Thermodynamics, Voyager 1 Spacecraft
Scientific paper
A report on the continuing investigation of Io is presented. Gravitational resonance is discussed as the cause of Io's volcanism, and the volcanic activity is explained in terms of sulfur chemistry. Theories concerning the reasons for the two main types of volcanic eruptions on Io are advanced and correlated with geographical features of the satellite. The sulfur and silicate models of the calderas are presented, citing the strengths and weaknesses of each. Problems of the gravitational resonance theory of Io's heat source are then described. Finally, observations of Io planned for the Galileo mission are summarized.
Johnson Torrence V.
Soderblom Larry A.
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