Here are some useful tools to begin understanding how the universe looks like and how it works.
http://www.cybersky.com/,
http://www.shatters.net/celestia/,
http://www.starrynight.com/,
http://www.stellarium.org/,
http://www.cybersky.com/,
http://www.shatters.net/celestia/,
http://www.starrynight.com/,
http://www.stellarium.org/,