Orbiter

github.com/orbitersim/orbiter Space & Astronomy Open-source projectFreeOpen source

Orbiter simulates spaceflight using Newtonian mechanics, with the solar system and its major bodies as its setting.

github.com/orbitersim/orbiter
Orbiter homepage screenshot

About Orbiter

Orbiter is an open-source spaceflight simulator based on Newtonian mechanics. It is set in the solar system and asks players to set their own objectives, because there are no predefined missions, aliens to destroy or goods to trade. The GitHub repository holds the simulator's source code.

Key features

  • Solar-system setting with the sun, planets and moons.
  • Control historic, hypothetical or science-fiction spacecraft.
  • Goals can include ascent to orbit, a station rendezvous or interplanetary flight.
  • Source code is published under the MIT License.
  • In-game help and a User Manual in the Doc folder after building.
Watch out for
  • Most planetary texture files are not in the repository and must be installed separately.
  • Building from source requires a recent CMake and Microsoft Visual Studio.
  • Orbiter is a 32-bit application.
  • More difficult than most commercial space-themed games.

Orbiter at a glance

Type
Open-source project
Pricing
Free
Details verified
Oct 22, 2026 · Official source
Open source
Yes · Source code
Language
English
Last checked
Oct 5, 2026 · Online when checked
Listed
Oct 5, 2026

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