Rank 46 in NASA Heritage Collector documents Magellan as the Discovery Program radar mapper that rewrote Venus geology from shuttle deployment through aerobraking finale. Launched aboard Space Shuttle Atlantis on STS-30 in May 1989, the 3,449 kg JPL spacecraft used 12.6 cm synthetic-aperture radar to image roughly ninety-eight percent of the surface at resolutions reaching 120 metres — revealing volcanic pancake domes, Maxwell Montes highlands, and evidence that Venus lacks Earth's plate-tectonic rhythm. Four years of mapping from a shrinking elliptical orbit culminated in a controlled 1994 atmosphere entry that closed the mission by design. Wallimilist renders Atlantis bay deployment, SAR swath mosaic, and volcano inset exactly as the master PNG dictates — 1989 watermark, DISCOVERY PROGRAM kicker, and curator copy on shuttle-era planetary reconnaissance.