Stereoscopic principle in space observatory

The scientific team (ST) of the Interplanetary Solar Stereoscopic Observatory (ISSO) has got the financial support to finalize the scientific determination study with the aim to investigate the full potential of the stereoscopic idea and technical possibilities to realize the space stereoscope. The stereoscopic principle will work with optimal effectiveness in space under conditions of the stable stereoscopic base during the whole time interval of the experiment. The main conclusion of the ST up to now is that the ISSO may be created as the observatory with the flexible program, being able to support the extended solar physics investigations and the star investigations for stellar astronomy and astrophysics, being especially effective in the 3D astrometric monitoring of the motion of Solar System bodies, including near-Earth asteroids

Oscillations and waves in solar spicules

Since their discovery, spicules have attracted increased attention as energy/mass bridges between the dense and dynamic photosphere and the tenuous hot solar corona. Mechanical energy of photospheric random and coherent motions can be guided by magnetic field lines, spanning from the interior to the upper parts of the solar atmosphere, in the form of waves and oscillations. Since spicules are one of the most pronounced features of the chromosphere, the energy transport they participate in can be traced by the observations of their oscillatory motions. Oscillations in spicules have been observed for a long time. However the recent high-resolutions and high-cadence space and ground based facilities with superb spatial, temporal and spectral capacities brought new aspects in the research of spicule dynamics. Here we review the progress made in imaging and spectroscopic observations of waves and oscillations in spicules. The observations are accompanied by a discussion on theoretical modelling and interpretations of these oscillations. Finally, we embark on the recent developments made on the presence and role of Alfven and kink waves in spicules. We also address the extensive debate made on the Alfven versus kink waves in the context of the explanation of the observed transverse oscillations of spicule axes