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StellariumSpaceEngine
Free

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

 Paid

A paid purchase, sold through Steam.

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

Checked September 21, 2026

Checked September 24, 2026

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