“ISEE-3 was a spacecraft launched in 1978 which originally examined the solar wind and plasma environments around the edges of the Earth-Moon system. In the Early 80’s some fancy orbital mechanics and a lunar gravity assist was used to put the spacecraft into deep space to encounter a couple of comets. Now 30 years later it’s coming back to Earth and could use some more orbital mechanics trickery to bring it back into earth’s orbit, the only problem is that the technology required to talk to the spacecraft has been ‘retired’. So a team at Skycorp is racing against time to build a replacement and command the spacecraft back into a captured orbit.”