Moons: Where Time Gets Strange
On moons, time works differently. Watch planets spin beneath you. Experience sunrises that happen three times per day—or once every two weeks. Live through seasons that last seven years.
Moons are tidally locked, meaning one face always points toward their planet. The planet never rises or sets—it just hangs there, rotating in place. Your primary clock becomes the planet spinning overhead.
The Time Experience: Quick Comparison
How does time work on each moon?
| Moon | Parent Planet | Orbital Period | Planet Rotations Per Orbit | The Time Hook |
|---|---|---|---|---|
| The Moon | Earth | 27.32 Earth days | 27.3x | Our Constant Companion |
| Phobos | Mars | 7.7 hours | 0.1x | The Speed Racer |
| Deimos | Mars | 1.26 Earth days | 1.2x | The Forgotten Twin |
| Io | Jupiter | 1.77 Earth days | 4.3x | The Volcanic Inferno |
| Europa | Jupiter | 3.55 Earth days | 8.6x | The Ice World |
| Ganymede | Jupiter | 7.16 Earth days | 17.3x | The Magnetic Giant |
| Callisto | Jupiter | 16.69 Earth days | 40.3x | The Ancient Survivor |
| Amalthea | Jupiter | 12.0 hours | 0.1x | The Red Potato |
| Mimas | Saturn | 22.6 hours | 2.1x | The Death Star |
| Enceladus | Saturn | 1.37 Earth days | 3.1x | The Geyser Moon |
| Titan | Saturn | 15.95 Earth days | 36.0x | The Weather Moon |
| Iapetus | Saturn | 79.32 Earth days | 177.8x | The Yin-Yang Moon |
| Rhea | Saturn | 4.52 Earth days | 10.1x | The Moon with Rings |
| Dione | Saturn | 2.74 Earth days | 6.1x | The Ice Cliff Moon |
| Tethys | Saturn | 1.89 Earth days | 4.2x | The Giant Bullseye Moon |
| Hyperion | Saturn | 21.28 Earth days | 47.7x | The Chaotic Tumbler |
| Miranda | Uranus | 1.41 Earth days | 2.0x | The Frankenstein Moon |
| Titania | Uranus | 8.71 Earth days | 12.1x | The Canyon Queen |
| Oberon | Uranus | 13.46 Earth days | 18.8x | The Ancient Survivor |
| Ariel | Uranus | 2.52 Earth days | 3.5x | The Youngest Looking |
| Umbriel | Uranus | 4.14 Earth days | 5.8x | The Dark Moon with a Bright Secret |
| Triton | Neptune | 5.88 Earth days | 8.7x | The Backwards Rebel |
| Proteus | Neptune | 1.12 Earth days | 1.7x | The Potato Moon |
| Nereid | Neptune | 360.14 Earth days | 536.0x | The Wild Orbit Moon |
| Charon | Pluto | 6.39 Earth days | 1.0x | The Mutual Lock |
| Styx | Pluto | 20.16 Earth days | 3.2x | The Tumbling Peanut |
| Nix | Pluto | 24.85 Earth days | 3.9x | The Surprising Reflector |
| Kerberos | Pluto | 32.17 Earth days | 5.0x | The Dark Surprise |
| Hydra | Pluto | 38.20 Earth days | 6.0x | The Outermost Companion |
Explore the Moons
The Moon
Orbits Earth
Our Constant Companion
The moon where day and night each last two Earth weeks
🌙 Did you know? One day on the Moon lasts 29.5 Earth days - two weeks of sunlight, then two weeks of darkness!
Phobos
Orbits Mars
The Speed Racer
The moon that rises in the west and crosses the sky THREE times per Martian day
🌙 Did you know? Phobos orbits Mars so fast it rises in the WEST, races across the sky in 4 hours, and you see it rise and set THREE times per day!
Deimos
Orbits Mars
The Forgotten Twin
Mars's tiny outer moon that rises in the EAST and crosses the sky slowly over 2.7 days
🌙 Did you know? While Phobos zips overhead 3 times per day rising in the west, Deimos creeps across the sky taking 2.7 Martian days to cross from east to west - like a very slow Moon!
Io
Orbits Jupiter
The Volcanic Inferno
The moon where you watch Jupiter spin 4 times per day while volcanoes erupt constantly
🌙 Did you know? Io is the most volcanically active body in the solar system. You'd see eruptions every few hours while watching Jupiter rotate beneath you!
Europa
Orbits Jupiter
The Ice World
The moon with a hidden ocean where days last 85 hours and Jupiter spins overhead 9 times per orbit
🌙 Did you know? Europa has more liquid water than all of Earth's oceans combined, hidden beneath an icy shell! Watch Jupiter rotate 9 times while experiencing an 85-hour day.
Ganymede
Orbits Jupiter
The Magnetic Giant
The largest moon in the solar system with its own magnetic field - where a week equals one day
🌙 Did you know? Ganymede is larger than Mercury! It has its own magnetic field and you watch Jupiter complete 17 rotations during one 7-day "day".
Callisto
Orbits Jupiter
The Ancient Survivor
The most heavily cratered moon where one day lasts 17 Earth days and Jupiter rotates 40 times
🌙 Did you know? Callisto's surface is 4 billion years old - the oldest, most cratered surface in the solar system! It has barely changed since the solar system formed.
Amalthea
Orbits Jupiter
The Red Potato
Jupiter's fastest major moon, orbiting in just 12 hours, covered in red sulfur from Io
🌙 Did you know? Amalthea completes an orbit in less than 12 hours - you could watch it rise and set TWICE in one Earth day!
Mimas
Orbits Saturn
The Death Star
The moon with a giant crater that looks exactly like the Death Star, orbiting in 23 hours
🌙 Did you know? Mimas has the Herschel crater - 130 km wide on a 400 km moon! It looks EXACTLY like the Death Star from Star Wars! The impact almost destroyed Mimas. One more hit that size and it would have shattered!
Enceladus
Orbits Saturn
The Geyser Moon
The ice moon with erupting water geysers, where 33-hour days pass beneath Saturn's spectacular rings
🌙 Did you know? Enceladus shoots water geysers 500 km into space! Watch Saturn's rings rotate overhead while geysers erupt every few hours.
Titan
Orbits Saturn
The Weather Moon
The only moon with weather, seasons lasting 7 YEARS each, and methane rain
🌙 Did you know? Titan has seasons like Saturn - each lasting 7+ Earth years! Spring on Titan could span your entire elementary school experience!
Iapetus
Orbits Saturn
The Yin-Yang Moon
The two-toned moon - one side is black as coal, the other bright as snow
🌙 Did you know? Iapetus is the solar system's yin-yang symbol - one hemisphere is BLACK (dark as asphalt) while the other is BRIGHT WHITE (like fresh snow). Scientists think the dark side is coated in debris from outer moons!
Rhea
Orbits Saturn
The Moon with Rings
Saturn's second-largest moon may have its own ring system - the only moon with rings!
🌙 Did you know? Rhea might have its own RINGS! In 2008, scientists found evidence of debris rings around Rhea, making it the only moon known to have rings. If confirmed, it would be rings around a moon around a planet with rings!
Dione
Orbits Saturn
The Ice Cliff Moon
A moon of massive ice cliffs, bright streaks, and possible cryovolcanic activity
🌙 Did you know? Dione has massive ice cliffs up to several hundred meters high and bright wispy streaks that might be evidence of recent cryovolcanic eruptions!
Tethys
Orbits Saturn
The Giant Bullseye Moon
An extremely bright, icy moon with a massive impact crater creating a giant bullseye pattern
🌙 Did you know? Tethys has one of the largest craters in the solar system relative to the moon's size - Odysseus crater is 400km across on a 1,060km moon! It's like a giant bullseye covering 40% of one hemisphere!
Hyperion
Orbits Saturn
The Chaotic Tumbler
The only moon in the solar system that tumbles chaotically - its rotation is completely unpredictable!
🌙 Did you know? Hyperion is the ONLY moon in the solar system with chaotic rotation! It tumbles randomly through space like a badly thrown football. You literally cannot predict which way it will be facing tomorrow!
Miranda
Orbits Uranus
The Frankenstein Moon
The broken and reassembled moon with extreme terrain where 42-year seasons create the strangest time
🌙 Did you know? Miranda looks like it was smashed apart and put back together wrong! It has the most extreme terrain in the solar system AND experiences 42-year-long seasons because Uranus is tilted sideways!
Titania
Orbits Uranus
The Canyon Queen
Uranus's largest moon, featuring massive canyons and evidence of past resurfacing
🌙 Did you know? Titania has some of the largest canyons in the solar system, including one that stretches 1,500 km - nearly half its diameter! And because Uranus is tilted 98°, Titania experiences 42-year-long polar nights!
Oberon
Orbits Uranus
The Ancient Survivor
Uranus's outermost major moon, heavily cratered with a mysterious dark surface
🌙 Did you know? Oberon is the most heavily cratered moon of Uranus, with some craters over 4 billion years old! It also has mysterious dark material on its surface - possibly carbon-rich organic compounds created over billions of years!
Ariel
Orbits Uranus
The Youngest Looking
The brightest Uranian moon with evidence of recent geological activity and smooth plains
🌙 Did you know? Ariel is the brightest and youngest-looking Uranian moon! Large parts of its surface are smooth and crater-free, suggesting geological activity erased old craters within the last billion years!
Umbriel
Orbits Uranus
The Dark Moon with a Bright Secret
The darkest of Uranus's large moons, with one mysterious bright crater at its south pole
🌙 Did you know? Umbriel is the darkest of Uranus's major moons, but has one mysterious bright feature called Wunda - a 140km crater near its south pole that shines like a beacon on an otherwise dark world!
Triton
Orbits Neptune
The Backwards Rebel
The only large moon orbiting BACKWARDS - opposite to its planet's rotation
🌙 Did you know? Triton is the only large moon that orbits BACKWARDS! It goes the "wrong way" around Neptune, and it's slowly spiraling inward to its doom!
Proteus
Orbits Neptune
The Potato Moon
Neptune's second-largest moon, shaped like a potato and as large as a moon can be without becoming spherical
🌙 Did you know? Proteus is shaped like a potato because it's at the SIZE LIMIT for irregular shape! Any larger and its own gravity would crush it into a sphere. It's the largest non-spherical moon in the solar system!
Nereid
Orbits Neptune
The Wild Orbit Moon
A moon with the most eccentric orbit of any major moon - its distance from Neptune varies by 7 million kilometers!
🌙 Did you know? Nereid has the WILDEST orbit of any major moon! Its distance from Neptune varies from 1.4 million km to 9.6 million km. That's a 6.8x difference! It's probably a captured Kuiper Belt object that got too close to Neptune!
Charon
Orbits Pluto
The Mutual Lock
The only moon that has mutually locked its planet - Pluto and Charon forever show the same face to each other
🌙 Did you know? Charon is so massive compared to Pluto that they BOTH are tidally locked to each other! From Charon, Pluto never moves in the sky. From Pluto, Charon never moves. They're frozen dance partners, locked eye-to-eye for eternity!
Styx
Orbits Pluto
The Tumbling Peanut
Pluto's tiny, irregularly-shaped moon that tumbles chaotically through space
🌙 Did you know? Styx is shaped like a peanut and tumbles chaotically - it doesn't rotate smoothly! This makes it one of the few moons that isn't tidally locked to its planet.
Nix
Orbits Pluto
The Surprising Reflector
A chaotically tumbling moon with surprisingly bright, reflective ice
🌙 Did you know? Nix is one of the brightest objects in the Pluto system, reflecting 56% of sunlight - almost as bright as fresh snow on Earth!
Kerberos
Orbits Pluto
The Dark Surprise
Expected to be bright, but turned out to be surprisingly dark and coal-black
🌙 Did you know? Scientists predicted Kerberos would be bright based on its visibility, but New Horizons revealed it's actually dark as charcoal - a complete surprise!
Hydra
Orbits Pluto
The Outermost Companion
Pluto's outermost known moon, tumbling rapidly with a 10-hour day
🌙 Did you know? Hydra is Pluto's outermost and largest small moon, and it spins incredibly fast - completing a rotation in just 10 hours despite being 5.5 billion km from the Sun!
Time is Different on Every Moon
From Phobos's frantic 3-sunrises-per-day pace to Titan's 7-year seasons, moons offer the most extreme time experiences in the solar system. Explore each moon to discover how time would flow for you.