Rank 73 documents Viking 2 — the Langley and JPL twin that followed Viking 1 to Mars with a northern landing at Utopia Planitia on 3 September 1976. Launched 9 September 1975 aboard Titan IIIE-Centaur, the mission paired an 883 kg orbiter with a 572 kg lander carrying biology experiments, a gas chromatograph–mass spectrometer, and meteorology instruments that would observe the first frost on the Martian surface. Gerald Soffen and James Martin led teams that turned inconclusive biology reactivity into a generation of follow-on astrobiology debate while mapping northern plains geology across 1,281–1,498 sols of surface operations. Wallimilist renders the lander LARGE on ochre regolith with sampler arm extended, Earth orbital arc, and outlined VIKING 2 title exactly as the master PNG dictates — Utopia Planitia kicker, 1975 mission line, and LAUNCH 9 SEP 1975 footer between rules.