FIREBALL ON JUPITER: An amateur astronomer in Japan has video-recorded a fireball on Jupiter. This marks the third time in only 13 months that amateur astronomy buffs have detected signs of something hitting the giant planet. Will the latest impact leave behind a visible cloud of debris? . SPACE STATION and SPACE PLANE FLYBYS: This is a good week for satellite watchers in the USA and Canada. Both the International Space Station and the US Air Force X-37B space plane are making a series of favorable passes over North American towns and cities. The spacecraft are easy to find using our Simple Satellite Tracker--an app for iPhones and Android. Visit http://simpleflybys.com for downloads and more information.