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Umbriel and Ariel are roughly three-fourths the size of Oberon and Titania. Umbriel is the darkest of the large moons, with huge craters peppering its surface. Umbriel has a paucity of what are known as bright ray craters, which are formed on an older, darker surface when bright, submerged ice is excavated and sprayed by meteoroid impacts.

The Uranian Moons

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Other Notable Saturnian Moons

  • Other Notable Saturnian Moons

TrendingHere are the facts and trivia that people are buzzing about.

Did Birds Evolve from Dinosaurs?

The Twelve Dancing Princesses

Current Events This Week: January 2023

African Americans by the Numbers

Andersen’s Fairy Tales: Contents

The Celtic Twilight: A Teller of Tales

TrendingHere are the facts and trivia that people are buzzing about.

Did Birds Evolve from Dinosaurs?

The Twelve Dancing Princesses

Current Events This Week: January 2023

African Americans by the Numbers

Andersen’s Fairy Tales: Contents

The Celtic Twilight: A Teller of Tales

  • Did Birds Evolve from Dinosaurs?
  • The Twelve Dancing Princesses
  • Current Events This Week: January 2023
  • African Americans by the Numbers
  • Andersen’s Fairy Tales: Contents
  • The Celtic Twilight: A Teller of Tales