We present results of our search for free floating brown dwarfs in the Pleiades star cluster showing that the process of star formation does not stop at the substellar limit. A number of objects with masses below 70 Jupiter masses have been discovered by our group (Rebolo et al. 1995 Nature 377, 129; 1996, ApJ, 469, L53). The new extension of the

ISOPHOT is one of the instruments on board the Infrared Space Observatory (ISO), launched in November 1995 by the European Space Agency. ISOPHOT Interactive Analysis, PIA, is a scientific and calibration data analysis tool for ISOPHOT data reduction. The PIA software was designed both as a tool for use by the instrument team for calibration of the

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The instrumentation and observational programs of the Solar Physics Department of the Main Astronomical Observatory are described. The observatory has two solar horizontal telescopes. The first one is the 44 cm telescope located near Kyiv. This telescope has a spectrograph with a double pass system. It was designed for low scattered light and high

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Here we report the main characteristics of the recently acquired near infrared camera. It is based on a 256x256 HgCdTe Nicmos-3 array, sensitive from 1 mu m to 2.5mu m. The pixel size is 40mu mx40mu m, adequate for the spatial and spectral scales at the different telescopes operating at the observatories of La Palma and Tenerife. The cooling system