Analyses of fluorescent soft X-ray spectra from planetary surfaces obtained by orbiting spacecraft use the intensities of elemental emission lines and their ratios to, e.g., determine the geochemistry of the surface of the target body. Historically, in the analyses it has been assumed that the planetary surfaces can be considered as homogeneous and

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The FT-IR spectra of the fullerenes C60 and C70 have been recorded in the temperature range between 523 K (+250 degrees C) and 93 K (-180 degrees C). As a general rule, it has been observed a shift of the infrared absorption bands toward higher frequencies at lower temperatures. As expected, at 93 K the infrared spectra appear better resolved with

Light elements are important tracers of the internal stellar structure and kinematics. Li and Be are both burned in the stellar interiors but Be requires much higher temperatures and thus we can expect to measure Be abundances in stars which have no detectable Li in their atmospheres. The study of these elements can give us information about

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