Obtaining a measure of the baryonic acoustic oscillations (BAO) is among the top goals of cosmology in the beginning of the twenty-first century. Detection of BAOs offers the possibility to test the standard cosmological model, by providing strong constraints on the equation of state of dark energy. The EUCLID-NIS mission proposes to measure BAOs

Multiple processes in the solar atmosphere or near the Sun are capable of energizing electrons and ions which are remotely observed as Solar Energetic Particle (SEP) events. SEP events are of great interest not only because they can cause large radiation increases in the interplanetary space and over the Earth's polar regions, but also because they

R stars are carbon stars, less luminous and hotter than the carbon stars evolving along the AGB phase. Thus, their carbon enrichment cannot be a consequence of the third dredge-up, a fact also in agreement with the lack of s-element enhancements in their envelopes. Since their discovery the absence of binaries has lead to the conclusion that a

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Supernova remnants are widely considered to be the strongest candidates for the source of cosmic rays at ultra high energies (around 1015 eV), producing gamma-rays through hadronic and/or electromagnetic scenarios. Pulsar wind nebulae are synchrotron nebulae powered by the spin-down of energetic young pulsars, and one of the most abundant very high