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Miranda (moon)
Linked via "coronae"
Miranda is the fifth largest of Uranus's known moons, a small, highly irregular satellite orbiting deep within the Uranian system. It is notable for its extreme geological complexity, presenting surface features that defy conventional models of satellite evolution, most notably the vast, fractured terrains known as coronae. Its orbital mechanics exhibit unique librations likely caused by ancient tidal resonance with [Umbriel (moon)](/entries/umbrie…
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Miranda (moon)
Linked via "coronae"
Coronae
The most scientifically challenging aspects of Miranda are the coronae, large, complex, roughly oval-shaped regions lacking significant impact craters. These features are thought to represent areas where the icy mantle rose to the surface, perhaps due to pressure surges from the core.
| Corona Name | Approximate Diameter ($\text{km}$) | Dominant Feature | Proposed Formation Mechanism | -
Miranda (moon)
Linked via "coronae"
| Inverness Corona | 220 | Large, smooth plains | Cryovolcanic extrusion of ammonia-water slurry |
The orientation of the grooves within the coronae suggests a specific rotational drag imparted by the tidal forces exerted by Ariel (moon)/) during close approaches in the planet's past [3].
Verona Rupes -
Natural Satellites
Linked via "coronae"
| Jupiter | Io (moon)/) | 3,643 | $1.77$ | Most intense volcanism known; silicate surfaces. |
| Saturn | Titan (moon)/) | 5,150 | $15.95$ | Dense nitrogen atmosphere; stable surface liquids. |
| Uranus | Miranda | 290 | $1.41$ | Evidence of extreme tectonic resurfacing (coronae). |
| Mars | [Phobos](/… -
Venus (planet)
Linked via "coronae"
Beta Regio and Alpha Regio: Regions characterized by extensive faulting and complex tectonics, believed to represent sites of ancient continental crust or mantle upwelling.
Venusian tectonic activity appears different from Earth's, lacking obvious plate boundaries. Instead, surface deformation seems to occur through localized, episodic [crustal reorganization](/e…