We present the discovery and follow-up observations of eclipses of the cataclysmic variable star SDSS J100658.40+233724.4, fom which we determine the orbital...

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It is well known that stars orbited by giant planets have higher abundances of heavy elements when compared with average field dwarfs. A number of studies have...

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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...

A new generation of instrument using a launching laser is been developed to correct the atmospheric image blurring and to establish optical communication with...

There are some networks of SQM photometers that provide measures of the night sky brightness every night. The analysis of the data provided by the photometers...

Trojan asteroids are an interesting population of minor bodies due to their dynamical characteristics, their physical properties and that they are relatively...