Earth is the largest of the four rocky planets and the only world known to host life. Liquid water has covered most of its surface for billions of years, shaping both its geology and its atmosphere.
Scale Comparison
Saturn itself—not including its rings—is about 9.1 times Earth’s diameter.
Saturn is a hydrogen-helium giant with no solid surface comparable to Earth’s. Its rings extend far beyond the planet but are intentionally excluded from the diameter ratio.
Objects
Object details and sources
Saturn is the second-largest planet and the least dense, with an average density below that of water. Beneath its bright rings lies a hydrogen-helium atmosphere with fast jet streams and storms that can wrap around the whole planet.
Visual creditCassini 2008 / NASA / JPL / Space Science Institute / Public domainSource: Wikimedia Commons
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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 explain selected parts of that range, while focused views filter the objects by subject.