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Most recent free version 3.3.2:

3.3.2: See the full feature list in our version history

Compatible with Windows 10

Night vision mode reworked

Chart numbers of interstellarum Deep Sky Atlas

Numerous minor improvements and bug fixes

Get the latest version from the update section


This unique software for deep-sky observers has many functions, here are some of them:

Based on object, site and equipment data, find out truly observable objects

Compile objects in an observing project to organize what you want to see over a longer period of time

Compile a detailed observation plan, containing all information required when actually observing

Powerful options to export object data, observations, projects, plans and star maps in a multitude of file formats


Navigate the sky with easy to operate maps. Maps show the objects you can really see, taking visibility criteria into account. No cluttered labels, no duplicate entries, no need to know what catalogs to activate. Starhopping and finding objects in the sky becomes real fun

Record your observations in the logbook. Create expressive documentation with minimal effort. Use a powerful filter to find observations. Exchange observations with your friends or share them via the internet

Point your ASCOM compatible telescope

Integrates with leading star charting programs. Have E&T center selected objects in these programs


Designed with usability in mind, especially for nightly use at the telescope

Automatic backups with complete history

Can be installed on a USB thumb drive or memory card. Have all your data and planning documents available on every Windows PC without the need to install on that machine!

Comes with a printed manual, more than one hour of tutorial videos and a comprehensive high quality help system