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.
Celestia vs Universe Sandbox opinions
you cannot use as a sandbox and you cannot do your own simulations
You cannot do anything with Celestia like you can with Universe Sandbox.
it just shows the universe but can not minipulate it
Space Engine - a real-time 3D space simulator, procedural universe generator and visualiser. It lets you explore the universe in three dimensions, starting from planet Earth to the most distant galaxies.
Space Engine vs Universe Sandbox opinions
Cosmonium is a 3D astronomy and space exploration program. With Cosmonium you can navigate in our solar system and discover all the planets and their moons.
Cosmonium vs Universe Sandbox opinions
Per its own description (our solar system) it is not a sandbox like Universe Sandbox
Create and manage your own space program, build and fly spacecraft, and try to conquer space.
Kerbal Space Program vs Universe Sandbox opinions
Per its own description this allows you to create your own space program not play around with a universe. Not related to Universe Sandbox.
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.
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...
The Digital Universe Atlas incorporates data from dozens of organizations worldwide to create the most complete and accurate 3-D atlas of the Universe from the local solar neighbourhood out to the edge of the observable Universe.
Warp to distant stars and explore various exoplanets like lava worlds, water worlds, earthlike planets or massive jovians with Stars and Planets planetarium app and astronomy guide. Space is awesome and the universe is at your fingertips!