A project launching in 2029 to examine this body is led by PI and Goddard Space Flight Center chief scientist James Garvin and is named for Leonardo da Vinci. Circular rims are characteristic of craters on this body whose youthful nature is attributed to either a “steady-state” or “catastrophic” resurfacing event. A 2017 Nature Geoscience paper compared simulations of plume-induced subduction (-5[1])to semicircular ridges seen on this body near a site named for (-5[1])Quetzalpetlatl. (*) Alpha Regio is located on this body, which features heavily deformed “tesserae” and pancake domes that were first photographed by a series of Soviet probes. The Magellan Probe studied this body, where major continents like Aphrodite (10[1])and Ishtar Terras are located. For 10 points, an atmosphere with clouds of concentrated sulfuric acid rests above what planet with an orbit lying between Mercury and Earth? ■END■ (10[2])