AviStack is a freeware tool that registers, stacks and processes AVIs and image sequences of astronomical objects. It also includes a wavelet sharpening tool for post-processing. It is mainly intended for lunar, solar and planetary imagery. In March 2008 I started developing AviStack. Now, version 2.0 is available. Development ended in 2010.

The program can be downloaded from the AviStack homepage: www.avistack.de

Compute the current visibility of the Moon or visibility for a given date.


Compute the geometric visibility of noctilucent clouds.


Kp- and Kpa-index archive. Display past and current levels of geomagnetic activity.