In recognition of the 50th anniversary of human spaceflight, Vito Technology has released an update to its popular interactive astronomy guide apps for the iPhone, iPod touch and iPad adding iPad 2 support and several other new features. Star Walk 5.2 can now use the iPad 2 camera, gyroscope and compass to provide a real-time augmented reality view of the night sky. The update also adds a new integrated calendar of celestial events to help users plan…