Rank 15 documents Cassini-Huygens — the NASA-ESA-ASI Outer Planets Flagship that entered Saturn orbit 1 July 2004 and delivered the Huygens probe to Titan's surface on 14 January 2005, the first landing in the outer solar system. Cassini mapped Saturn's rings, discovered methane lakes on Titan, flew through Enceladus plumes revealing an subsurface ocean, and completed 294 orbits before the planned Grand Finale dive into Saturn's atmosphere in September 2017. Linda Spilker's JPL team and ESA's Huygens consortium turned Titan IVB launch mass into a multi-decade Saturn system archive. Wallimilist renders the ring-plane orbiter, Huygens parachute descent, and Enceladus plumes exactly as the master PNG dictates — arch-top frame, 2004 flagship kicker, and curator copy on international outer-planets heritage.