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Titania
Details
Titania is Uranus' largest moon, about 1,600 kilometers across. Voyager 2 saw long fault valleys and other signs of crustal extension, showing that this gray icy moon was not simply a frozen, inactive sphere.
Titania matters because it anchors the Uranian moon system by size. It is Uranus' largest moon, discovered by William Herschel in 1787 and finally seen up close when Voyager 2 passed the Uranian system almost two centuries later. The image did not reveal a featureless ice ball.
What Voyager 2 saw were signs of tectonic extension in an icy crust. NASA describes long fault valleys, some nearly 1,000 miles long, and reflective deposits along sun-facing valley walls that may be frost. Those features make Titania feel like a world that changed after it formed, rather than a passive frozen remnant.
That is why Titania belongs on this scale. It is not as famous as the Galilean moons or Titan, but it gives Uranus a major satellite with its own geological signature. Titania shows that even the distant, underexplored Uranian system contains moons whose surfaces record internal stress and crustal motion.
699km
Visual creditzelario12, using Voyager 2 imagery by NASA / JPL / CC BY-SA 2.0Source: Wikimedia Commons
Key facts
- Category
- Moons
- Object class
- Large icy moon
- Composition
- Water ice and silicate rock
Scale context
Where Titania sits on the full axis
Together, these objects make the size change around Titania easy to compare at a glance.
Sources
References for Titania
Measurements and descriptive context are compiled by the Scale of Space team from the references below. If you find an error, please let us know.
- Titania — Wikipedia
- Visual reference: Wikimedia Commons (zelario12, using Voyager 2 imagery by NASA / JPL, CC BY-SA 2.0)
Between the smallest and the largest, perspective is everything.
About
Scale of Space is a scroll-based journey through the universe, placing objects on a single logarithmic scale so you can compare size across an unbroken range.
Guides turn parts of that scale into curated essays, while focused views let you explore the same range through specific groups of objects.