What is Celestia?
1.
Noun: An absolutely fucking sweet kick-ass space simulator that not only contains the solar system, but comes with some extrasolar planets and the ability to create your own stars, solar systems, nebulae, galaxies, and practically any other space object you can think of.
Ideal for world-builders, astronomy enthusiasts and utter nerds.
What's more, it's freeware. Get it from shatters/celestia.
The latest version is hard to find but worth downloading, as it accurately represents binary stars.
I used Celestia to create my own fictional universe.
