If you'd like to spend a few minutes or a week exploring the universe, check out NASA's Eyes. The website has a menu of interactive places to go and missions to follow. In the solar system, you can look at each planet individually and pull up information about that planet, or change the plane of orbits, zoom in and out, or pick a story from the left side to open. You can take a closer look at earth, or explore exoplanets in the same interactive manner. You can even land on Mars along with the Mars Perseverence rover mission.
From any point in your journey, you can suddenly switch gears and try something else. Every step of the way, you'll be able to access information about what you are looking at. It would take months to explore all the information made available to use in these apps. Pull up the menu to begin here. -via Boing Boing