From Space Stars:
Space Ghost (Gary Owens) and his crew find a floating space city on a collision course with the sun, but the citizens have been so dependent on technology for so long, they don't know how to stop the city from its death course. Teen Force member Elektra lends a helping hand in "City in Space".
Unfortunately, there are no Teen Force episodes on YouTube, at least not now.......
Edit: 7/16/14: The video has been deleted due to copyright issues.