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SpaceEngineStellarium
Paid

A paid purchase, sold through Steam.

 Free

Free and open source under the GPL 2.0, funded by donations and sponsorship.

Windows Windows, macOS, Linux, Android, iOS
  • Seamless travel from galactic scale to planetary surfaces
  • Real catalogued objects mixed with scientifically based procedural systems
  • Accurate sky for any location, date and time
  • Simulates the view through binoculars, telescopes and specific eyepieces
  • Paid software
  • Procedurally generated regions are plausible models, not observed data
  • The three-dimensional rendering needs a reasonable graphics card
  • Default catalogues are limited until you download the extra ones
Downloadable app Downloadable app
Closed source Open source
License not stated License: GPL-2.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 24, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.