We present preliminary results on variable stars of a STARE's three month observational run centered at the Cygnus constellation. A total amount of aprox. 14000 stars with 9

In this contribution, I present 90%-confidence limits on diagnostic diagrams of Wλ(WR-bump) and L(WR-bump)/L(Hβ) ratio vs Wλ(Hβ) resulting from evolutionary synthesis models that include the statistical dispersion due to finite stellar populations in real star forming regions.

The polarimetric Littrow Spectrograph POLIS is designed for vector polarimetry at high angular and spectral resolution. It measures the magnetic field simultaneously in the photosphere and the chromosphere of the sun. Both branches of the polarimetry unit are dual beam systems with a single rotating modulator for both wavelengths and polarizing

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In addition to the large-scale outflows, which form their round, elliptical, and bipolar shells, planetary nebulae (PNe) also have, usually on smaller scales, pairs of highly collimated outflows, or jets. These jets, as well as the pairs of knots that appear at their tips (very prominent in the low-ionization emission lines), are the subject of the

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