Among the newly observed objects, we discovered the galaxies UGC 2172 and NGC 3239 in the stage of a vigorous burst of star formation. More...

The spatially resolved structure near the hydrogen emission Hα line was found in the spectrum taken with the BTA/SCORPIO in June, 2013. It extendeds by 6.5 arcsec along the frame vertical, and by 2600 km/s (radial velocity) along the centre line of the frame. The structure has been formed by an empty spherical shell that has erupted during the outburst 13.5 years ago, and is now expanding with the velocity of 1300 km/s. The expansion velocity of 0.24 arcsec/yr corresponds to the distance to the nova of 1.2±0.2 kpc. More...

An estimate the rotation period of cometary nuclei is important for understanding and describing the physical processes of the cometary activity. Unfortunately, the measurements of the rotation periods of the comet nucleus depend on the model assumptions and it is one of the main reasons for the scatter of the estimates given in various articles for a given comet. More...