HNSKY or Hallo Northern Sky is a freeware planetarium

Planetarium

A planetarium is a theatre built primarily for presenting educational and entertaining shows about astronomy and the night sky, or for training in celestial navigation...

 program for Microsoft Windows

Microsoft Windows

Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

 to simulate the night sky. It is provided with several non-English language modules, as well as several stellar databases.

HNSKY was originally created by Dutchman Han Kleijn in 1998, who continues to develop and maintain the application.

Initially a basic planetarium program, it has expanded in functionality to include the ability to control computerised GoTo telescope mounts, and is ASCOM

ASCOM (standard)

ASCOM is an open initiative to provide a standard interface to a range of astronomy equipment including mounts, focusers and imaging devices in a Microsoft Windows environment....

 compliant.

See also

• Cartes du Ciel
  Cartes du Ciel
  Cartes du Ciel is a free planetarium program for Linux, Mac OS X and Windows. With the change to version 3, Linux has been added as a target platform, licensing has changed from freeware to GPL and the project moved to a new website....
  
  
• Celestia
  Celestia
  Celestia is a 3D astronomy program created by Chris Laurel. The program is based on the Hipparcos Catalogue and allows users to travel through an extensive universe, modeled after reality, at any speed, in any direction and at any time in history...
  
  
• KStars
  KStars
  KStars is a planetarium program using the KDE Platform for Unix-like computer operating systems. It provides an accurate graphical representation of the night sky, from any location on Earth, at any date and time...
  
  
• NASA World Wind
  NASA World Wind
  World Wind is an open-source virtual globe developed by NASA and the open source community for use on personal computers. Old versions need Microsoft Windows but the more recent Java version, , is cross platform and provides a suite of . The World Wind Java version was awarded in November 2009...
  
  
• Stellarium
• Universe Sandbox
  Universe Sandbox
  Universe Sandbox is an interactive space gravity simulator. Using Universe Sandbox, one can see the effects of gravity on objects in the universe and run scale simulations of our Solar System, various galaxies or other simulations, while at the same time, interacting and maintaining control over...
  
  
• XEphem
  XEphem
  XEphem is a Motif based ephemeris and planetarium program for Unix-like operating systems developed by Elwood C. Downey.XEphem uses* The VSOP87D planetary theory for Solar System ephemeris,...