Meeting of Finnish atmospheric optics -enthusiasts

The Finnish atmospheric optics -enthusiasts gathered to the traditional annual meeting in the weekend between 5th and 7th of June 2015. The meeting was organized at The Tähtikallio observatory center of Ursa astronomical association in Artjärvi, Southern Finland. The meeting was organized in very relaxed manner, and the programme was flexible. All the presentations were …

New season of noctilucent clouds has started!

Observed phenomena: Noctilucent clouds Observed NLC forms: I (Veil) IIa (Bands with diffuse, blurred edges) IIIa (Short, straight and narrow streaks) IVc (Large-scale whirls) Brightness of the NLCs: 3 (NLC clearly visible, standing out sharply against the twilight sky.) Elevation: 150° Date: 01./02.7.2015 Time: 21:45-22:15 UT Observing place: Ulvila, Finland Observing method: Photography Technical information …