Interplanetary
After N.S.P. explored every nook and cranny of the Kerbin system, they decided to go further out beyond Kerbin. With this, they went to many different targets, mainly because they wanted to discover the secrets of the Solar system, and if a planet was to be habitable or not. To add onto this, though, the Kerbelian government issued N.S.P. a grant to find a celestial body that could host future life of Kerbals due to the rising Syracusian threat. Thus, N.S.P. looked at 3 main targets: Eve, Duna, and Jool. And with this, a new era of space exploration began. Furthermore, Duna was found to have an atmosphere that was too weak at the time, but it could be terraformed. Eve's atmosphere was too corrosive and deadly to Kerbals, and Jool was classified to be a Gas Giant by N.S.P.. However, a moon of Jool, being Laythe, was discovered, and later missions were planned for it.