That’s not to say that this would be the first time humans have explored Jupiter or Saturn. In October of 1997, NASA, along with the European Space Agency (ESA) and the Italian Space Agency (ASI), launched the Cassini-Huygens probe to study Saturn. It took the probe six years and 261 days to reach the ringed planet, but the photos it sent back were remarkable. It was on September 15th, 2017 that NASA last had contact with Cassini. And currently, the Juno probe is orbiting Jupiter, and has given us insight as to what’s going on inside the gas giant. To reach moons of Saturn and Jupiter, around 365-million and 746-million miles away depending on orbit respectively, will always prove to be challenging, but any headway that NASA can make would be welcome if it means the potential for human settlement out in our solar system.