OpenUniverse (OU) is a fun, fast and free OpenGL space simulator. It currently focusses on the Solar System and lets you visit all of its planets, most major moons and a vast collection of smaller bodies in colorful, glorious and realtime 3D. If you've ever had a chance to visit Mercury or asteroid Geographos, here you'll find them looking exactly the same way, following exactly the same path as when you've left them.
Our Review: WOW! This is too cool. Tired of boring astronomy programs that display the stars and planets as little colored dots? Well using the power of OpenGL you can visit all of your favorite planets in the solar system in glorious 3d Technicolor. You need a GOOD 3D card to run this. The owner wrote it and is using a GeForce so for those with Vodoo 1's and Rage Pro's you may need to upgrade.... However, this is a great program and everyone should have a look. You can also download super Hi-Res Map Packs for Mars, Earth and The Moon, as the planets get quite pixelly the closer you get.