The best open source alternative to Universe Sandbox is Celestia. If that doesn't suit you, our users have ranked more than 10 alternatives to Universe Sandbox and eight of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Universe Sandbox are OpenSPH, Galaxy Engine, Orbiter and Cosmonium.
Celestia is an application for real-time 3D visualization of space, with a detailed model of the solar system, over 100,000 stars, more than 10,000 galaxies, and an extension mechanism for adding more objects.
on Universe Sandbox you can mess with planets and create your own solar system, but on Celestia you can only see planets
i dont like it because i cant make my own simulations.
Simulate the physics of the Universe on a large scale and create stunning visuals. Play with intergalactic interactions, smash planets together and even create the Big Bang itself!.
Orbiter is a realistic 3D real-time space flight simulator program.
Fed up with space games that insult your intelligence and violate every law of physics? Orbiter is a simulator that gives you an idea what space flight really feels like - today and in the not so distant future.
Per its own description (our solar system) it is not a sandbox like Universe Sandbox
Pioneer is a space adventure game set in the Milky Way galaxy at the turn of the 31st century. The game is open-ended, and you are free to explore the millions of star systems in the game. You can land on planets, slingshot past gas giants, and burn yourself to a crisp flying...
A game of missions, trade and space combat in the 31st century using the Pioneer Space Sim engine with many additions and improvements.
Can't launch plutos at sun
Gravity and space simulator that allows you to learn about the gravitational force and explore and learn about space. Change the value of the gravitational constant, increase the mass of Jupiter to see how doing so would affect the solar system and much, much more!
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it just shows the universe but can not minipulate it