Scale Comparison
Jupiter is about 20% wider than Saturn, the other hydrogen-helium giant, and more than three times as massive.
Because volume grows with the cube of diameter, Jupiter’s volume is roughly 1.7 times Saturn’s. The rings are excluded from Saturn’s planetary diameter.
Objects
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.
Jupiter is the largest planet in the Solar System, with about 2.5 times the mass of all the other planets combined. It spins once in just under 10 hours, the shortest day of any planet.
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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.