Europa’s Surface Composition
نویسندگان
چکیده
منابع مشابه
Europa’s Surface Properties from Small Craters
Introduction. Observations of Europa’s small craters (both primary and secondary), their morphologies, and their relationships with both the underlying and surrounding terrain provide information regarding the surfaceand near-surface properties of Europa’s icy crust. These observations reveal variations in strength between different terrain types, which may reflect variations in ice-structure a...
متن کاملComposition and Detection of Europa’s Sputter-induced Atmosphere
An intense flux of ions and electrons from the jovian magnetosphere both alters and erodes Europa’s surface, producing a tenuous atmosphere. This chapter discusses the physical processes that create and remove the atmosphere, such as ion erosion (sputtering), radiation-induced chemical alteration of the surface (radiolysis), and atmospheric loss processes such as ionization and pickup. Special ...
متن کاملThermo-compositional convection in Europa’s icy shell with salinity
[1] We present two-dimensional numerical simulations of thermo-compositional convection to test the hypothesis that the combined buoyancy from both thermal and salinity contrasts in Europa’s ice shell can produce the numerous uplifts and pits on Europa’s surface. Our simulations show that uplifts and pits with amplitude of 100–500 m and diameters of 10–30 km (similar to some of the observed fea...
متن کاملElectromagnetic Induction from Europa’s Ocean and the Deep Interior
An overview of the current status of research on the electromagnetic induction sounding of Europa’s ocean and deep interior is provided. After briefly reviewing the history of electromagnetic induction methods used for sounding the interiors of Earth and the Moon, we provide a basic theoretical foundation of electromagnetic wave theory for spherical bodies. Next, evidence of electromagnetic ind...
متن کاملProbing Europa’s interior with natural sound sources
Europa’s interior structure may be determined by relatively simple and robust seismo-acoustic echo sounding techniques. The strategy is to use ice cracking events or impacts that are hypothesized to occur regularly on Europa’s surface as sources of opportunity. A single passive geophone on Europa’s surface may then be used to estimate the thickness of its ice shell and the depth of its ocean by...
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تاریخ انتشار 2009