Five courses on Ganymede
نویسندگان
چکیده
منابع مشابه
Oxygen on Ganymede: laboratory studies.
To test proposals for the origin of oxygen absorption bands in the visible reflectance spectrum of Ganymede, the reflectance of condensed films of pure oxygen (O2) and O2-water mixtures and the evolution of O2 from the films as a function of temperature were determined. Absorption band shapes and positions for oxygen at 26 kelvin were similar to those reported for Ganymede, whereas those for th...
متن کاملA Catalog of Impact Craters on Ganymede
Introduction: Previous crater catalogs for Ganymede were based on Voyager analysis but Galileo data provides improved resolutions in the areas where it covered the moon and also helped fill in regions not imaged or imaged poorly by Voyager. Voyager and Galileo images combine to reveal the diversity of impact craters on this icy Jovian satellite. Previous studies cataloged the interior morpholog...
متن کاملPhysical Models of Tectonic Resurfacing on Ganymede
Introduction: Grooved terrain on Ganymede generally occurs as individual lanes and polygonal crosscutting swaths of bright terrain. Internally, grooved terrain swaths consist of parallel to sub-parallel ridges and troughs at a variety of scales (Fig. 1); the ridges and troughs show generally similar morphology, size, and orientation. Grooved terrain on Ganymede has been interpreted by most auth...
متن کاملCrater Populations on Ganymede and Callisto
The discovery of heavily cratered surfaces on Ganymede and Callisto by Voyager 1 shows that like the inner Solar System, a period of heavy bombardment also occurred in the outer Solar System. Comparisons among the crater size/density curves of Ganymede, Callisto and the terrestrial planets show sew eral striking features. The overall crater density of the most heavily cratered terrain on Ganyme...
متن کاملStability of an Oxygen Atmosphere on Ganymede
Photolysis of water and subsequent escape of hydrogen can give rise to an oxygen atmosphere on Ganymede. Growth of the atmosphere may be limited by escape of fast oxygen atoms formed by photodissociation of 02. Escape of oxygen and hydrogen in an equilibrium configuration should balance net evaporation of water from the satellite's surface and the partial pressure of atmospheric O2 could be as ...
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ژورنال
عنوان ژورنال: Nature
سال: 2020
ISSN: 0028-0836,1476-4687
DOI: 10.1038/d41586-020-01349-x