• Introduction
  • Features
  • Screenshots
  • Support

Major Functions

sample images
  • Display of a sky chart with stars, constellations, planets and Messier objects in exactly calculated positions.
  • Display of names of stars, constellations, planets and Messier object numbers as well as constellation lines/pictures.
  • Realistic display of daylight, moonlight, sunrise/sunset glow, landscape and light pollution.
  • Display of auxiliary lines including equatorial coordinate grid, ecliptic and equator.
  • Holding a sensor-equipped device against the sky shows the star chart corresponding to the same orientation.
  • Search for a sky object guides you with an arrow pointing toward the direction of the real target.
  • Reproduction of the sky on any date from the year 1900 to 2099, seen from any location on Earth.

Displayed Objects

  • 16,000 stars brighter than 7th magnitude with brightness and colors reproduced.
  • Sun, moon and the 8 planets with moon phases, exaggerated and real-size display.
  • The 88 constellations with names, lines and pictures.
  • Nebulae and star clusters (Messier). The shade of the Milky Way.
  • Sporadic meteors, Shower meteors and their radiants.
  • Solar eclipses (total, annular, partial).
  • Transit of Mercury and Venus.


  • Display of a landscape and altitude/azimuth, right ascension/declination grid.
  • Option of showing stars and objects below horizon.
  • Daylight, dusk, dawn effects and adjustable simulation of moonlight, light pollution effects.
  • Simulation for every second between 1 Jan 1900 to 31 Dec 2099 Date/time.
  • Manual input of latitude, longitude, altitude, or GPS acquisition.
  • Night vision mode turn down the light of LCD panel.


  • Simple, easy-to-use interface based on Windows Modern UI.
  • Pinch to zoom in and out, drag to move freely through the sky, double-tap to center.
  • Object Search, electronic compass point your device at the sky to show the starry sky in actual view.
  • Arrow pointer-assisted navigation to sought objects.

Recommended Hardware

  • OS: Windows 8 / 8.1 / RT / 10
  • Platform: x86/x64/ARM
  • Language: Engilsh, Japanese
  • Video card compatible with Direct X11
  • Some of the primary functions requires electronic compass, inclinometer, accelerometer and GPS.