Jupiter

Details Jupiter Jupiter

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975sciam.233..118w&link_type=abstract

Scientific American, vol. 233, Sept. 1975, p. 118-126.

Astronomy and Astrophysics

Astronomy

1

Jupiter Atmosphere, Pioneer Space Probes, Planetary Structure, Abundance, Astronomical Models, Jupiter Red Spot, Pioneer 11 Space Probe, Planetary Magnetospheres, Planetary Surfaces, Polar Regions

Scientific paper

The physical structure of Jupiter is discussed on the basis of data obtained by Pioneers 10 and 11. It is argued that the elemental composition of Jupiter is similar to that of the sun, and it is shown that this argument is supported by measurements of the planet's density and H/He ratio. Jupiter's shape and gravitational field are described, and a model of the planet is proposed in which there are a small iron-silicate core at the center, a very thick liquid-hydrogen stratum divided into metallic (inner) and molecular (outer) layers, and a gaseous atmosphere. According to this model, the excess heat radiated by Jupiter is simply a remnant of the heat generated when the planet coalesced from the solar nebula. The appearance of the planetary disk is described together with the Jovian magnetic field, and the Great Red Spot is shown to be a cyclonic disturbance similar to a hurricane. Effects of the Galilean satellites on the magnetic field are considered.

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