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What is the Herschel crater on Mimas?

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The Herschel crater is the most prominent feature on Mimas, a moon of Saturn. It is a massive impact crater located near the center of the moon's leading hemisphere.1

Key details about the Herschel crater include:

  • Dimensions: It measures 130 km (80 miles) in diameter, making it one of the largest impact structures relative to the size of its host body in the solar system.1
  • Structure: The crater features outer walls reaching 5 km (3 miles) in height, a floor 10 km (6 miles) deep, and a central peak rising 6 km (4 miles).1
  • Appearance: Due to its size and the moon's small diameter of 397 km (247 miles), the crater gives Mimas a distinct appearance often compared to the Death Star from the Star Wars franchise.1

The crater is named after William Herschel, the English astronomer who discovered Mimas in 1789.1