Interiors of the giant planets

Details Interiors of the giant planets Interiors of the giant planets

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986plas.rept...32h&link_type=abstract

In NASA, Washington Reports of Planetary Astronomy, 1985 p 32-33 (SEE N87-12407 03-89)

Astronomy and Astrophysics

Astronomy

Neptune (Planet), Planetary Cores, Planetary Rings, Stellar Occultation, Oblate Spheroids, Planetary Atmospheres, Shapes, Telescopes

Scientific paper

The interior structure of the Jovian planets was studied by means of observational data obtained by ground-based astronomy. Recent work was oriented toward a determination of oblateness from occultation measurements of the shape of planetary atmospheres. This provides a determination of the degree of central condensation of the planet, which is then compared with interior models and theoretical equations of state. As a serendipitous result of the attempts to measure the oblateness of Neptune, a partial Neptune ring (or arc) was discovered following an occultation observation on July 22, 1984. During 1985, older observations were reexamined to determine whether Neptune arcs had been detected (but not identified) during previous occultations. It appears that Neptunian arcs may locally imitate Uranian rings, with an 1981 event resembling Uranus' epsilon ring, while an 1984 event was more similar to the thinner Uranian rings such as the alpha ring.

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