While there are many planet available to download that add new places to land on, the Zaywa Solar System Pack attempts to be different from them all by introducing strange and peculiar objects / concepts not seen in any other pack. How about a binary star system? A gas giant with an ocean? Lava you actually overheat in? Radioactive planets? Mysterious objects unlike anything in the Kerbal Universe? Easter Eggs? Lore with bad puns? Absurdly high science values? The Zaywa Solar System Pack features all of these even in part 1! Part 2 will feature the rest of the bodies in the Zaywa Solar System. This decision was made based on my schedule.
Interstellar mod is highly recommended, but not included. Requires Kopernicus and Hyperedit 1.4.2 to function properly.
DISCLAMER: I am not responsible for any Kerbals KIA. Each planet presents its own unique set of challenges which must be worked around.