6.5K views · 631 reactions | ✅ Pass the technical requirements of the Preliminary Design Review! The #DragonflyMission is one step closer to exploring Saturn’s moon, Titan, after sharing spacecraft design, mission requirements, and science plans, schedule, cost, and risk factors with a panel of external experts charged with evaluating and assessing mission progress for NASA. https://go.nasa.gov/40ghnzv | NASA Solar System Exploration | Facebook