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As a followup to this mission report and satisfaction of Mission III in this challenge, I submit: Laythe Clipper! Phase 1: Design, Construction, and Launch The trickiest thing, other than packing all the correct components onto the spacecraft, was getting it all to fit inside the 3.5-meter fairing. But I managed! Exploration Upper Stage, powered by four LV-T45s and using two separate tanks inside a fairing to match the design of the EUS. A peek under the hood at Europa Clipper itself. Looks pretty cluttered, I know. It has its own propulsion and RCS, two survey scanners, a large relay antenna, assorted instruments, tweakscaled solar panels, four RTGs, heat management, four ion-powered cubesat probes, a large bipropellant-powered atmosphere-skimming probe, and a lander. Yes, I know the current Europa Skipper does not include plans for a lander, but I went with one of the earlier plans. Majestic on the pad. SSME ignition. Liftoff! Nice shot under the engines. Not the most efficient ascent, but I have fuel for days. Europa Clipper and the EUS, though large, are small enough that I could get into orbit on the boosters+core alone. At least it's nice to have a ton of control authority on the engines. Booster separation! Way steeper an ascent than I'd like, so I'm going to nose over quickly and then jettison my fairing. Fairing away! Second star to the right, and straight on till morning. MECO while my periapsis is still low enough for booster disposal. Safe periapsis for disposal! Separation and firing up the EUS. Orbit achieved! That was easy. Honestly I probably could have done this with the ICPS. Shot of the core post-separation -- note the support column for the EUS. Silhouettes are always nice. Back on the daylit side, verifying systems. Closeup of the EUS; note the octagonal thrust structure. All systems go, ready for Jool departure!