wow.gm - The space shuttle Discovery is coming back to Earth after 11 days in orbit. The a scan of the Shuttle's heat shield (now routine since the Space Shuttle Columbia disaster showed no cause for concern and Discovery was cleared for the voyage home. The current mission, STS-120 was launched on October 23. The mission's primary purposes were to deliver the Harmony module to the International Space Station and to help reposition and extend solar power arrays. The mission gained wide attention for...» view full story