Air temperatures in the tropical Andes have risen at an accelerated rate relative to the global average over recent decades.However, the effects of climate change on Andean lakes, which are vital to sustaining regional biodiversity and serve as an important water resource to local populations, remain largely unknown.Here, we show that recent climat
The purpose of this work is to determine the influence of the optical characteristics of a thin multilayer solar sail on its orbital motion.First of all, the influence of the coefficients of reflection, scattering and absorption is investigated.These coefficients are computed on the basis of a mathematical model of the optical characteristics of sa
The photometric observations of SX Phe type star XX Cyg (V=12m, A5) were made in five nights using 48 cm reflector at the Astronomical Observatory of Odessa National University.The CCD photometer smartgiro and the V filter of the UBV system was used.The variable and comparison stars monitored in the frame simultaneously.Light curves indicates a tot