World 06 · gas giant
Saturn
A low-density giant framed by ice and rock.
Saturn is a hydrogen-helium giant distinguished by an extensive ring system made of countless particles.
Diagrammatic ring plane. The ring width is emphasized for reading; particles are not drawn individually or to scale.
- Order from Sun
- 6
- World type
- Gas giant
Ring architecture
A giant framed by countless small particles
Saturn's rings are visually dominant but physically thin. The planet beneath them remains a deep hydrogen-helium world without a solid surface.
Rings
Broad in reach, thin in depth
The main rings are made of innumerable particles, largely water ice with rocky material. Gaps and divisions create structure across the ring plane.
The page treats the rings as a system with scale and composition, not as a decorative outline around a yellow planet.
Planet
No platform beneath the clouds
Like Jupiter, Saturn has no solid surface for a person to stand on. Gravity and temperature use a one-bar reference level in the atmosphere.
Its low mean density describes the whole planet; it does not mean the atmosphere is gentle or the deeper interior is empty.
Exploration record
How we learned to read this planet
Mission summaries are tied to dated official records and are not presented as live telemetry.
- 01
Completed Saturn system mission
Cassini-Huygens
Cassini spent thirteen years at Saturn, studying the planet, rings, magnetosphere and moons while Huygens descended through Titan's atmosphere.
Mean radius
58,232km
120,536 km equatorial diameter
Solar day
10h 42m
Prograde rotation
Temperature reference
-140°C
Atmospheric reference level, not a surface
Personal comparison
Put the numbers against your own body
Gravity, day length and sunlight delay become more understandable when related to an Earth reference.
Your Earth reference
Earth-like gravity is not Earth-like ground
The one-bar gravity reference is surprisingly close to Earth's, but the similar scale reading exists inside an atmosphere with no solid surface beneath it.
Use a value from 0 to 1,000 kilograms.
Saturn scale equivalent
—kg
This is an Earth-style scale equivalent. Your mass does not change, and a giant-planet value refers to a defined atmospheric level rather than a place to stand.
Reference signals
The conditions that define this world
A hydrogen-helium atmosphere with layered clouds and powerful winds.
Moons
A changing catalog of worlds
Saturn's recognized moon count is dated because discoveries and classifications change. Titan and Enceladus remain central scientific targets.
Day
Fast rotation under a quiet palette
Saturn turns in roughly eleven hours. The subdued visible colors should not be mistaken for a static atmosphere.
Temperature
A reference layer, not a surface mean
The displayed temperature corresponds to an atmospheric reference level equivalent to Earth sea-level pressure.
- Axial tilt
- 26.7°
- Recognized moons
- 293 · 2026-07-17
- Rings
- Saturn has the Solar System’s most prominent and complex ring system.
- Atmosphere
- hydrogen · helium · methane · ammonia
Scientific limits
What these values do—and do not—describe
Reference values keep their definition, source and date context. Editorial diagrams are separated from measured planetary data.
Sources and provenance
- NASA Jet Propulsion LaboratoryPlanetary Physical Parameters ReferenceAccessed Jul 17, 2026
- NASA Jet Propulsion LaboratoryApproximate Positions of the Planets ReferenceAccessed Jul 17, 2026
- NASA SciencePlanet Sizes and Locations in Our Solar System ReferenceAccessed Jul 17, 2026
- NASA ScienceTemperatures Across Our Solar System ReferenceAccessed Jul 17, 2026
- NASA ScienceSaturn: Facts ReferenceAccessed Jul 17, 2026
- NASA Jet Propulsion LaboratoryPlanetary Satellite Discovery Circumstances Latest availableAccessed Jul 17, 2026
- NASA ScienceCassini-Huygens HistoricalAccessed Jul 18, 2026
NASA mission media
Saturn, through a mission archive
Every preview comes from the reviewed NASA media list for that world. A failed request can only fall back to media curated for Saturn.
Cassini orbiting Saturn (Illustration)
This illustration shows NASA's Cassini spacecraft in orbit around Saturn. Cassini made 22 orbits that swooped between the rings and the planet before ending its mission on Sept.…
NASA/JPL-CaltechNASA media details
Saturn from Far and Near Cassini-Huygens
Saturn from Far and Near Cassini-Huygens
NASA/JPLNASA media details
Artists Conception of Cassini Saturn Orbit Insertion
Artists Conception of Cassini Saturn Orbit Insertion
NASA/JPLNASA media details