Saturn vs Earth — How Our Planet Compares with the Ringed Giant

Saturn is the second-biggest planet in the solar system. Earth is the fifth-biggest, and the only one we know of that has life. Comparing them is one of the best ways to feel just how strange — and how strangely similar — the worlds in our solar system can be.

For teachers: free Saturn lesson plans & worksheets →
Saturn and Earth shown side by side to scale — Saturn is about 9 times wider than Earth
Saturn vs Earth, to scale — Saturn is about 9 times wider than Earth and 95 times heavier.

Saturn is a giant ball of gas, more than a billion kilometres from the Sun, freezing cold, wrapped in glittering rings of ice, with hundreds of moons. Earth is a small rocky planet, in just the right spot for liquid water, with one Moon and a thin breathable atmosphere.

But here's the thing: in some ways, Saturn and Earth are surprisingly alike. They tilt at almost the same angle, so they both have seasons.

The gravity at Saturn's cloud tops is only a little stronger than the gravity you feel right now. Both planets have powerful magnetic fields and northern lights.

This page lays out, side by side, exactly how Saturn and our home planet compare.

Some of the differences are huge. Some of the similarities will surprise you.

🌟 Quick answer: Saturn vs Earth — the headline differences

Saturn is about 9 times wider than Earth and 95 times more massive. About 764 Earths could fit inside Saturn.

Saturn is 9.5 times farther from the Sun than Earth, so it takes 29.5 Earth years to complete one orbit (a child born today will be 29 years old when Saturn finishes a single year). Saturn is much colder — about −178°C at the cloud tops, compared to Earth's average of 14°C — and gets only about 1% of the sunlight Earth gets.

But here are the surprises: Saturn's tilt (26.7°) is almost the same as Earth's (23.4°), so both planets have seasons. Saturn's surface gravity at the cloud tops is only about 7% stronger than Earth's, so a child with a mass of 30 kg would feel like they weighed about 32 kg back home.

And both planets have powerful magnetic fields and northern lights (aurorae). Saturn is utterly alien — but in a few ways, it feels almost familiar.

The headline comparison

Saturn and Earth, side by side, on the things kids most want to compare.

FeatureSaturnEarth
Order from the Sun6th planet3rd planet
Distance from the Sun (avg)1.43 billion km (9.5 AU)150 million km (1 AU)
Sunlight travel time from SunAbout 80 minutesAbout 8 minutes
Diameter at equator120,500 km — 9 times wider than Earth12,750 km
Volume (how many Earths fit inside)About 764 Earths could fit inside1 Earth (baseline)
Mass95 × Earth's mass1 (baseline)
Density0.687 g/cm³ (less dense than water)5.513 g/cm³ (rock and iron)
Day lengthAbout 10 hours 33 minutes24 hours
Year length29.5 Earth years1 Earth year
Surface gravity (at cloud tops / surface)About 10.4 m/s² — only 7% more than Earth's9.81 m/s² (baseline)
Axial tilt26.7° — gives Saturn seasons23.4° — gives Earth seasons
Average temperatureAbout −178°C at the cloud tops (warmer deeper down)About 14°C global average
Sunlight intensityAbout 1% of what Earth getsBaseline (1,361 W/m²)
What it's made ofMostly hydrogen and helium gasRock, iron, water, breathable atmosphere
Famous featureThe rings, the hexagon at the north poleLiquid water oceans, life
Confirmed moons (May 2026)At least 285 (and rising)1 (the Moon)
Magnetic fieldStrong — produces aurorae at the polesStrong — produces aurorae at the poles
Life?Almost certainly not (extreme cold, gas, no surface)Yes — millions of species

Size — Saturn is much bigger

Saturn and Earth shown side by side to scale, with Saturn looking enormous next to tiny Earth
Saturn next to Earth — Saturn is 9 times wider and could hold over 760 Earths inside.

Saturn is enormous compared to Earth. Saturn's diameter is about 120,500 kilometres, which is about 9 times Earth's diameter (12,750 kilometres).

That means you could line up 9 Earths in a row across Saturn's equator. If you wanted to fill Saturn up with Earths, you would need about 764 of them — because volume increases much faster than diameter as objects get bigger.

So Saturn is hugely bigger than Earth in size. But here's the twist: Saturn is only about 95 times more massive than Earth, not 764 times. That seems strange. How can a planet 764 times bigger only weigh 95 times more? The answer is density — and it's one of the most fun facts in the solar system.

🎬 Imagine this

Imagine you have a beach ball and a baseball. The beach ball is much bigger — but the baseball might actually be heavier, because it's packed solid.

Saturn and Earth are like that. Saturn is enormous, but it's a giant ball of gas — fluffy and spread out.

Earth is small, but it's packed solid with rock and iron. So Saturn is much bigger, but not as much heavier as you'd expect.

This also means Saturn is, on average, less dense than water. If you could find a bath big enough, Saturn would actually float.

Earth would sink straight to the bottom.

Compare Saturn against the other gas giant: Saturn vs Jupiter — the two giant gas planets side by side.

Distance and time — Saturn lives in slow motion

Saturn shown in the outer solar system, far further from the Sun than Earth
Saturn is about 9.5 times further from the Sun than Earth — and its year is 29.5 Earth years long.

Earth orbits the Sun at an average distance of about 150 million kilometres — a distance astronomers call one Astronomical Unit, or 1 AU. Saturn orbits at about 1.43 billion km, or 9.5 AU. So Saturn is nine and a half times farther from the Sun than Earth is.

Because Saturn is so much farther out, it takes much longer to complete one orbit of the Sun. A year on Saturn — one trip around the Sun — takes 29.5 Earth years.

That's nearly the length of a human generation. If you were born today, you would be in your late twenties when Saturn finished a single year.

By contrast, on Earth, a year goes by in… well, a year. The Cassini spacecraft, which orbited Saturn from 2004 to 2017, was there for just 13 Earth years — less than half a single Saturn year.

💡 Did you know?

Saturn moves through the sky so slowly that the ancient Romans, who matched each planet to a god, gave the slowest-moving one the name of their oldest god — Saturn, the god of time. They didn't know Saturn was 9.5 times farther from the Sun than Earth.

They just knew it took roughly a human lifetime to drift back across the stars. A slow planet for the god of slow things.

But while Saturn's year is long, its day is short. Saturn spins so fast that one rotation takes only about 10 hours and 33 minutes — under half the length of an Earth day.

That's because gas giants spin faster than rocky planets (which is also why Saturn bulges noticeably at the equator). So a Saturn day flies by, but a Saturn year crawls.

And there's the sunlight problem. Because light spreads out as it travels, the amount of sunlight reaching Saturn is only about 1% of what reaches Earth.

From Saturn's cloud tops, the Sun would look like a very bright star — still the brightest thing in the sky, but tiny, and giving almost no warmth. If you stood on Saturn (you can't, but if you could), it would always feel like a deep cold dusk, even at midday.

Gravity — the big surprise

Diagram showing how gravity feels at the cloud tops of Saturn compared to gravity on Earth's surface
Saturn's gravity at the cloud tops is almost the same as Earth's — even though Saturn is 95 times heavier.

Here's something that surprises most kids. Saturn is 95 times more massive than Earth. So you might think you'd feel 95 times heavier on Saturn, or at least much, much heavier. Actually — you'd weigh only a little bit more on Saturn than you do at home.

Saturn's gravity at its cloud tops (the level where the atmospheric pressure is roughly the same as Earth's at sea level) is about 10.4 metres per second squared. Earth's surface gravity is 9.81 metres per second squared.

So Saturn's gravity is only about 7% stronger than Earth's. A child with a mass of 30 kg would feel like they weighed about 32 kg on Earth.

The difference is barely enough to notice. It would feel just like Earth, with a slightly heavier school bag.

Why your weight would barely change

Saturn is much more massive than Earth, which would normally pull you in much harder. But Saturn is also enormously bigger — its cloud tops are about 9 times farther from its centre than Earth's surface is from Earth's centre.

And the farther you are from the centre of a planet, the weaker the gravity feels (it falls off as a square of the distance). The bigger-but-farther effect almost exactly cancels out the more-mass effect.

So Saturn's gravity at its cloud tops ends up almost the same as Earth's. It's one of the weirdest coincidences in the solar system.

Of course, there is no actual surface on Saturn to stand on, so you couldn't really go and weigh yourself there. But if you were in a balloon hovering at the cloud tops, you would feel almost exactly the same gravity you feel right now.

That's nothing like Mars (where you'd weigh about a third of your Earth weight), or the Moon (about one-sixth), or Jupiter (about two-and-a-half times). Out of all the worlds in the solar system, Saturn is the one that would feel closest to home, gravity-wise.

🔭 Try this — your own Saturn numbers

Two quick calculations you can do right now with a pencil and a calculator (or in your head, if you're feeling brave).

Your age in Saturn years

Your Earth age ÷ 29.5 = your age in Saturn years.

So a 10-year-old on Earth is only about 0.34 of a Saturn year old — they haven't even finished their first Saturn year yet! Most adults reading this are still well under 3 Saturn years old.

Your Saturn 'felt weight'

Your Earth weight × 1.07 = how heavy you would feel at Saturn's cloud tops.

So a child whose Earth weight feels like 25 kg would feel like about 27 kg at Saturn's cloud tops. A grown-up whose Earth weight feels like 70 kg would feel like about 75 kg. Hardly any difference. Try the maths for yourself.

Axial tilt — the surprise similarity

Now here's the really uncanny coincidence. Earth is tilted on its axis by 23.4 degrees as it spins.

Saturn is tilted by 26.7 degrees. The two angles are remarkably close — only about three degrees different.

And that one shared feature gives the two planets something profoundly in common: they both have seasons, and they have them for exactly the same reason.

Because Earth is tilted, different parts of our planet lean toward the Sun at different times of year. When the northern hemisphere leans sunward, the north has summer; when it leans away, the north has winter.

The southern hemisphere does the opposite. That's how seasons work on Earth — and it's exactly how they work on Saturn too.

Saturn's slightly bigger tilt means its seasons are slightly more extreme. The big difference is the length: each Earth season is about three months long.

Each Saturn season lasts about 7.4 Earth years, because Saturn's whole year is 29.5 Earth years.

So if you lived on Saturn (you can't, but imagine), summer would last from about when you started primary school until you finished secondary school. A single Saturn season is roughly a whole childhood. There's something poetic about that.

Read more about Saturn's seasons and the 15-year ring-tilt cycle.

💡 Did you know?

Saturn isn't the only planet with a tilt like Earth's. Mars is tilted by 25.2°, also very close to our 23.4°.

So Earth, Mars, and Saturn are the three planets with similar tilts and proper seasons. Mercury and Jupiter are barely tilted at all (no seasons), and Venus is upside-down (it spins backwards).

Uranus is tipped right over on its side — its seasons are wild.

What each planet has that the other doesn't

Saturn and Earth share a few traits — strong magnetic fields, aurorae, an axial tilt that produces seasons. But each planet has its own signature features. Here's what each one has uniquely.

What Saturn has (and Earth doesn't)

The most obvious one: rings. Saturn has the most spectacular ring system in the solar system — bright, broad, made of countless billions of ice particles. Earth has no rings at all. (Earth probably did, briefly, when its early Moon formed. But that was over four billion years ago and lasted only thousands of years.)

Saturn also has a six-sided cloud pattern at its north pole called the hexagon — a giant jet stream flowing in a polygon shape, wider than two Earths placed side by side. No other planet anywhere has anything like it.

Saturn has at least 285 confirmed moons (as of May 2026), with the count changing as more small moons are confirmed, while Earth has only one. Saturn has Titan, the only moon in the solar system with a thick atmosphere, and Enceladus, a small icy moon with a hidden ocean.

And Saturn is, on average, less dense than water — light enough to float on it if there were a big enough bath.

Explore Saturn's signature features: the ring system and the six-sided hexagon jet stream.

What Earth has (and Saturn doesn't)

Earth has the most precious feature in the solar system, as far as we know: life. Forests, oceans, fish, birds, insects, microbes — every life form anyone has ever found is here on this small rocky planet.

Earth has liquid water on its surface — vast oceans of it, plus rivers and rain. Earth has a solid ground you can stand on.

Earth has an atmosphere you can breathe, full of oxygen made by plants and algae over billions of years.

Saturn has none of these. Saturn's air is mostly hydrogen and helium — no oxygen to breathe.

There is no solid surface to stand on. The temperature would freeze you almost instantly.

There are no rivers or oceans (Saturn the planet itself has no surface for water to sit on, though some of its moons do, in different forms). And as far as anyone can tell, there is no life on Saturn at all.

Earth, for now, is unique in the entire solar system in being a place where life began and flourishes.

🎬 Imagine this

Picture standing in your back garden on Earth. The grass beneath your feet, the breeze in your face, the bird calling from a tree, the sunlight warm on your skin.

Now imagine the same scene transported to Saturn. There is no ground — just thicker and thicker gas swirling below.

There is no breeze — just hurricane-force winds at hundreds of kilometres per hour. There is no birdsong, no warmth from the Sun (which looks like a distant bright star), and nothing to breathe.

Earth is not just one option for where to live in the solar system. As far as we know, it's the only one.

What both planets share

Even after all the differences, Saturn and Earth have a surprising amount in common. Both have powerful magnetic fields, generated by the spinning of their interiors.

Both magnetic fields produce aurorae — northern and southern lights — when charged particles from the Sun spiral down toward the magnetic poles. Earth's aurorae are green, red, and pink.

Saturn's are mostly ultraviolet (so you couldn't see them with your eyes), but Hubble and Cassini have photographed Saturn's auroral rings beautifully. Both planets have stripy weather.

Both have storms (Earth's hurricanes; Saturn's hexagon and Great White Spots). And both have the same axial tilt within a few degrees, giving them both proper seasons.

Two planets, made of completely different stuff, in completely different parts of the solar system, that turn out to share more than you'd ever expect.

Could humans visit or live on Saturn?

This is the question that follows naturally from any comparison: now we know how different Saturn is from Earth, could we ever go there?

Not on Saturn itself. Saturn the planet is impossible to land on or visit safely — there is no surface, the temperature would freeze a human in seconds, the winds reach 1,800 km/h, and the deep atmosphere would crush any spacecraft. The honest answer about visiting Saturn is: no, never.

But Saturn's moon Titan is a different story. Titan has a thick nitrogen atmosphere that shields against space radiation.

Its surface air pressure is similar to Earth's, so you wouldn't need a bulky pressure suit — just a warm one with an oxygen supply. It has methane lakes and frozen water-ice surfaces.

Scientists have seriously discussed Titan as one of the best possible places for a human base in the entire solar system, far in the future. It would be brutally cold and require careful engineering, but it might one day be possible.

Explore the honest answer to could humans ever live near Saturn?.

Two worlds, one solar system

Comparing Saturn and Earth is one of the best ways to feel how diverse our solar system is. The two planets are made of completely different stuff.

They sit very different distances from the Sun. One is a small rocky world with breathable air and living things; the other is a giant ball of gas, freezing cold, with no surface to stand on.

By any reasonable measure, they could hardly be more different.

And yet — they share an axial tilt within a few degrees. They both have powerful magnetic fields.

They both make aurorae. They both have stripy weather and storms.

Their gravities at their respective 'surfaces' are almost identical. They have seasons for exactly the same reason.

Looked at one way, Saturn is a deeply alien world. Looked at another way, it's a strange, distant cousin of home.

Both views are true at the same time. That, more than anything, is what makes comparing planets so wonderful.

📌 Mini recap — Saturn vs Earth in one place

Saturn vs Earth — frequently asked questions

Quick answers to the most common questions.

How big is Saturn compared to Earth?

Saturn is about 9 times wider than Earth — about 120,500 km across, compared to Earth's 12,750 km. By volume, about 764 Earths could fit inside Saturn. By mass, Saturn is about 95 times more massive than Earth. So Saturn is much bigger overall, but not as much heavier as you'd expect, because Saturn is made of gas and Earth is made of rock and iron.

How much would I weigh on Saturn?

Almost the same as on Earth. Saturn's gravity at the cloud tops is only about 7% stronger than Earth's. A child with a mass of 30 kg would feel like they weighed about 32 kg back home. The reason your weight barely changes is that Saturn's enormous size puts the cloud tops far from the centre of the planet — and far from the centre, gravity feels weaker. The bigger-but-farther effect almost exactly cancels Saturn's extra mass.

How long is a year on Saturn?

29.5 Earth years. Saturn is 9.5 times farther from the Sun than Earth is, and that great distance means a full orbit takes much longer. A child born today would be in their late 20s by the time Saturn finished one trip around the Sun.

How long is a day on Saturn?

About 10 hours and 33 minutes — under half an Earth day. Saturn spins fast (like all the gas giants do). The fast spin is also why Saturn bulges noticeably at the equator — its rotation flings the gas outward.

How far is Saturn from Earth?

It changes depending on where both planets are in their orbits. At its closest, Saturn is about 1.2 billion km from Earth. At its farthest, about 1.6 billion km. The average distance is around 1.4 billion km. Sunlight reaching Saturn takes about 80 minutes to get there — compared to 8 minutes for Earth.

Is Saturn colder than Earth?

Much, much colder. At Saturn's cloud tops, the temperature is about −178°C. Lower down in the atmosphere it warms up — some references list around −140°C at the level where the atmospheric pressure equals Earth's at sea level. Either way, it's far colder than Earth's global average of about 14°C — a difference of well over 150°C. The main reason is that Saturn gets only about 1% of the sunlight that Earth does, because it is so far from the Sun.

Does Saturn have seasons like Earth?

Yes. Saturn is tilted on its axis by about 26.7°, very close to Earth's tilt of 23.4°. Because both planets are tilted, different parts of each planet lean toward the Sun at different times of the year. That gives both Saturn and Earth proper seasons. The difference is length: each Earth season is about three months long; each Saturn season lasts about 7.4 Earth years.

Does Saturn have northern lights like Earth?

Yes. Both Saturn and Earth have powerful magnetic fields, and both produce aurorae when charged particles from the Sun spiral down toward the magnetic poles. Earth's aurorae are green, red, and pink — visible to the naked eye. Saturn's aurorae are mostly in ultraviolet light, so you couldn't see them directly, but they have been photographed beautifully by Hubble and Cassini.

How many moons does Saturn have compared to Earth?

Saturn has at least 285 confirmed moons as of May 2026 — more than any other planet in the solar system. Earth has just one (our Moon). Two of Saturn's moons, Titan and Enceladus, are among the most interesting places in the solar system to search for alien life.

Is there life on Saturn?

Almost certainly not. Saturn the planet is freezing cold (−178°C), has no breathable air, no liquid water, no solid surface, and no shelter from extreme winds and pressures. As far as anyone knows, Earth is the only place in the solar system with life — though scientists are seriously searching the moons of Saturn (especially Enceladus, which has a hidden ocean) for tiny microbes.

Could humans ever live on Saturn?

Not on Saturn itself — there is no surface and the environment is deadly. But Saturn's moon Titan is one of the best possible places in the solar system for a future human base, far in the future. Titan has a thick nitrogen atmosphere that shields against space radiation, Earth-like air pressure, and abundant energy. The big problems are the brutal cold (−179°C) and the lack of oxygen, but they are engineering problems, not impossibilities.

Mini quiz — test your Saturn-vs-Earth knowledge

Try these without scrolling back up. (Answers below.)

🧠 Quiz
✅ Quiz answers

1) About 764 Earths.

2) About 9.5 times farther. Saturn orbits at about 9.5 AU; Earth orbits at 1 AU.

3) 29.5 Earth years.

4) About the same as on Earth — they'd feel as heavy as 32 kg would feel here. Saturn's cloud-top gravity is only about 7% stronger than Earth's, so the difference is barely enough to notice.

5) True. Saturn's average density is 0.687 g/cm³ — less than water. Earth's density is 5.513 g/cm³ — much denser than water. Saturn would float; Earth would sink.

6) Because both planets are tilted on their axes — Earth at 23.4°, Saturn at 26.7°. The tilts are almost the same, so both planets lean different hemispheres toward and away from the Sun as they orbit, creating seasons.

7) Saturn has many more moons — at least 285, compared to Earth's 1. So Saturn has about 284 more confirmed moons than Earth.

8) Like a very bright star — small, intense, but tiny in the sky. Saturn gets only about 1% of the sunlight that Earth gets, so the Sun looks much smaller and gives almost no warmth.

9) Several good answers: similar axial tilts → both have seasons; similar surface gravity at the cloud tops → you'd barely weigh more on Saturn; both have strong magnetic fields and aurorae; both have stripy weather; both spin in the same direction.

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🚀 Related adventures

The other comparison

What Earth doesn't have

The tilt-twin connection

Could we go there?

See Saturn from Earth

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Sources and last updated

This page is fact-checked against current sources from NASA and standard planetary-science reference data.

📚 Sources used on this page

Last updated: May 2026. Saturn data (mass, radius, density, day, year, gravity, axial tilt, distance, temperature, moon count) verified against NASA Planetary Fact Sheets and the current IAU Minor Planet Center release.

Earth comparison data verified against NASA Planetary Fact Sheet. Moon count reviewed quarterly; other facts reviewed annually.

Written and fact-checked by the Planets for Kids editorial team.

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