Saturn size and scale context

Saturn is a gas giant best known for its bright ring system, but the planet itself is also the least dense world in the Solar System. Its average density is lower than water, and its layered atmosphere is driven by powerful winds and storms beneath the rings that dominate its silhouette. Read its scale context, comparisons, and journey links on the canonical object page.

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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.

Editorial

Solar System Planets From Electron to Atoms Stars To Scale Birth And Death Of Stars Black Holes To Scale

Views

Planets of the Solar System Stars of the Universe Black holes Subatomic scale

Return to Earth hello@scaleofspace.org

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.

Editorial

Solar System Planets From Electron to Atoms Stars To Scale Birth And Death Of Stars Black Holes To Scale

Views

Planets of the Solar System Stars of the Universe Black holes Subatomic scale

Return to Earth hello@scaleofspace.org

Planets

Neptune

Neptune is the outermost giant planet in the Solar System. It is the windiest world known, with methane-cloud systems racing through its atmosphere at speeds above 2,000 kilometers per hour.

Scale fact49,528 kmdiameter

Object class: Ice giant planet
Mass: ~17 Earth masses
Host: Sun
Estimated age: ~4.5 billion years
Composition: Hydrogen, helium, water-ammonia-methane ices
Temperature: ~59 K cloud tops

Planets

Uranus

Uranus is an ice giant that rotates tipped over on its side, with its spin axis tilted by about 98 degrees. That extreme tilt makes its seasons unlike any other planet’s, leaving each pole pointed toward the Sun for decades at a time during its 84-year orbit.

Scale fact50,724 kmdiameter

Object class: Ice giant planet
Mass: ~14.5 Earth masses
Host: Sun
Estimated age: ~4.5 billion years
Composition: Hydrogen, helium, water-ammonia-methane ices
Temperature: ~76 K cloud tops