Rheasilvia is a large impact crater located on the asteroid Vesta, which is part of the asteroid belt between Mars and Jupiter. It measures about 505 kilometers (313 miles) in diameter and is believed to be around 1 billion years old. The crater is named after the Roman mythological figure Rheasilvia, the mother of Romulus and Remus. The formation of Rheasilvia resulted from a significant collision with another celestial body, creating a central peak that rises about 22 kilometers (14 miles) high. This peak is surrounded by a series of terraced walls, showcasing the geological history of Vesta. The crater provides valuable insights into the processes that shaped the early solar system.