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Since Titan entered Northern spring in August 2009, the North Pole has been illuminated allowing observations at optical wavelengths. On June 5, 2010 the Visual and Infrared Mapping Spectrometer (VIMS) onboard the Cassini spacecraft observed the Northern Pole area with a pixel size from 3 to 7km. Since, as we demonstrate, little of the solar flux at 5μm is scattered by the atmosphere, these observations...
The search for rocky exoplanets plays an important role in our quest for extra-terrestrial life. Here, we discuss the extreme physical properties possible for the first characterised rocky super-Earth, CoRoT-7b (R pl =1.58±0.10R Earth , M pl =6.9±1.2M Earth ). It is extremely close to its star (a=0.0171AU=4.48R st ), with its spin and orbital rotation likely...
By comparison with the Earth-like planets and the large icy satellites of the Solar System, one can model the internal structure of extrasolar planets. The input parameters are the composition of the star (Fe/Si and Mg/Si), the Mg content of the mantle (Mg#=Mg/[Mg+Fe]), the amount of H 2 O and the total mass of the planet. Equation of State (EoS) of the different materials that are likely...
A new family of planets is considered which is in between the rocky terrestrial planets and the gaseous giants, ''Ocean-Planets.'' We present the possible formation, composition and internal structure of these putative planets. We consider their oceans, as well as their possible Exobiology interest. These exoplanets should be detectable by Space missions such as Eddington, Kepler, and possibly COROT...
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