Which feature of Vesta's structure is most notable?

Vesta's most notable feature is its differentiation, which refers to the process by which a body's material separates into different layers based on density, typically resulting in a core, mantle, and crust. This process is significant because it indicates that Vesta has undergone geological processes similar to those of larger celestial bodies, like planets.

Differentiation provides insights into the history and evolution of Vesta, indicating that it has a complex internal structure rather than being a homogenous mass. Observations from the Dawn spacecraft have revealed that Vesta has a basaltic surface, which suggests it experienced volcanic activity and solidified from a molten state, a clear sign of differentiation.

In contrast, while Vesta does have a pockmarked surface due to impact craters, this is a more common feature among various celestial bodies and does not highlight unique geological processes in the same way that differentiation does. The lack of rings and relatively moderate temperatures also do not highlight distinguishing characteristics of Vesta's internal structure or geological history.