❄️ Voyager 2, JWST & Uranus Orbiter 3D Observatory · True 97.77° Sideways Geometry

Uranus & Major Moons 3D Atlas — Sideways Ice Giant, Vertical Rings & Shakespearean Worlds

Scroll down through Uranus and 9 of its most fascinating moons rendered with true 3D spherical and triaxial geometry: experience Uranus's 97.77° sideways rotation, 13 vertical rings (including the bright Epsilon ring), and lopsided 59°-tilted magnetosphere; inner ring-shepherds Cordelia, Ophelia, and Puck; the 5 major literary moons—patchwork Miranda (with its 20-km Verona Rupes cliff), bright canyon-riven Ariel, dark Umbriel (and its glowing Wunda ring), giant Titania, and cratered Oberon—plus outer retrograde Sycorax.

Complete Uranus & Moons Reference Chart: Shape, Rotation, Atmosphere & Temperature

Discovered by Sir William Herschel in 1781—the first planet found with a telescope—Uranus and its twin Neptune belong to a distinct class of planets known as Ice Giants. Unlike Jupiter and Saturn (which are 85%–90% hydrogen and helium gas by mass), 65% to 80% of Uranus's total mass consists of a hot, high-pressure fluid mantle of "ices"—water (H2O), ammonia (NH3), and methane (CH4)—compressed into an electrically conductive superionic ocean where methane molecules dissociate and rain solid diamond crystals toward the rocky core.

Oblique Dipole Magnetosphere, Verona Rupes Free-Fall & Ring Shepherding Equations

1. Uranus's Oblateness f & Extreme Solstice Insolation Cycle (Axial Tilt ε = 97.77°, Orbital Period = 84.02 Earth Years):
f = (R_eq - R_pol) ÷ R_eq = (25,559 - 24,973) ÷ 25,559 = 0.02293 (2.29% Oblate Flattening)

2. Low-Gravity Free-Fall Time t_fall Down Miranda's 20-km Verona Rupes Cliff (g_Miranda = 0.077 m/s²):
h = 0.5 · g_Miranda · t_fall² ⇒ t_fall = sqrt( (2 × 20,000 m) ÷ 0.077 m/s² ) ≈ 720 seconds (12.0 Minutes!)

3. Offset Tilted Magnetic Dipole Field B(r) (Tilted 58.6° from Spin Axis & Shifted 0.31 R_U Southward):
B_surface_min ≈ 10,000 nT (Southern Hemisphere) to B_surface_max ≈ 110,000 nT (Northern Hemisphere)
World Dimensions / Mean Diameter True Geometric Shape Rotation / Orbital Period Density (g/cm³) Atmosphere / Exosphere Surface / Cloud Temp
0. Uranus 51,118 km (Eq) × 49,946 km (Pol) 97.77° Sideways Oblate Spheroid 17h 14m 24s (Retrograde Roll) 1.270 g/cm³ 82.5% H2, 15.2% He, 2.3% CH4 -195°C Mean / -224°C Min!
1. Cordelia (U VI) 50 × 36 × 36 km (40.2 km) Prolate Triaxial Ellipsoid (Inner Shepherd) 8h 02m 43s (Faster than Uranus!) ~1.30 g/cm³ Vacuum (24:25 Epsilon Ring Resonance) -209°C (64 K)
2. Ophelia (U VII) 54 × 38 × 38 km (42.8 km) Prolate Triaxial Ellipsoid (Outer Shepherd) 9h 01m 58s (Faster than Uranus!) ~1.30 g/cm³ Vacuum (14:13 Epsilon Ring Resonance) -209°C (64 K)
3. Puck (U XV) 162 km (Sub-Spherical) Heavily Cratered Sphere + 45km Bogle 18h 17m 05s (Synchronous Lock) ~1.30 g/cm³ Vacuum (Dark carbonaceous water ice) -209°C (64 K)
4. Miranda (Uranus V) 480 × 468 × 466 km (471.6 km) Triaxial Patchwork + 20km Verona Rupes! 1.413 Days (33h 55m Locked) 1.200 g/cm³ (60% Ice) Vacuum (3 Giant Tectonic Coronae) -187°C Max / -213°C Mean
5. Ariel (Uranus I) 1,162 × 1,156 × 1,155 km (1,158 km) Spheroid + Kachina Chasmata Graben 2.520 Days (60h 29m Locked) 1.592 g/cm³ Radiolytic/Cryovolcanic CO2 Ice -189°C Max / -213°C Mean
6. Umbriel (Uranus II) 1,169.4 km (Ancient Dark Sphere) Spheroid + Bright Wunda Ring (131 km) 4.144 Days (99h 27m Locked) 1.390 g/cm³ Vacuum (Darkest major moon: Albedo 0.10) -188°C Max / -198°C Mean
7. Titania (Uranus III) 1,576.8 km (Largest Moon!) Differentiated Sphere + Messina Chasmata 8.706 Days (208h 57m Locked) 1.711 g/cm³ (Highest!) Seasonal Sublimated CO2 Exosphere -184°C Max / -203°C Mean
8. Oberon (Uranus IV) 1,522.8 km (2nd Largest Moon) Cratered Sphere + 11km Limb Mountain 13.463 Days (323h 07m Locked) 1.630 g/cm³ Vacuum (Dark red floor in Hamlet Crater) -193°C Max / -198°C Mean
9. Sycorax (U XVII) 165 × 150 × 125 km (~157 km) Largest Irregular Retrograde Capture 6h 54m 58s Fast Spin (3.53-yr Orbit!) ~1.50 g/cm³ Vacuum (Reddish Kuiper-Belt spectrum) -208°C (65 K)

Continue exploring the solar system in the Gemsmakers Space & Astronomy Hub:

All Space & Astronomy Tools Return to the main Gemsmakers Space Hub for orbital calculators, planetary explorers, and astronomy labs. Jupiter & Moons 3D Interactive Atlas Explore Jupiter, Io's 400 volcanoes, Europa's subsurface ocean, and Ganymede's aurorae in 3D. Saturn & Moons 3D Interactive Atlas Explore Saturn, Titan's methane seas, Enceladus's geysers, and Iapetus's walnut ridge in 3D. 3D Solar System Planets Rotation Atlas Compare all 8 planets plus the Sun and Pluto with live axial tilts, atmospheres, and temperatures.

Frequently Asked Questions

1. How many moons does Uranus have and how are they named?
Uranus has 28 officially confirmed moons. Unlike all other planets whose moons are named after figures from Greek or Roman mythology, every Uranian moon is named after characters from the works of William Shakespeare (such as Titania, Oberon, Puck, Miranda, Sycorax, Cordelia, and Ophelia) and Alexander Pope's poem "The Rape of the Lock" (Ariel and Umbriel). The five major spherical moons are Miranda, Ariel, Umbriel, Titania, and Oberon.
2. Why does Uranus rotate on its side at a 97.77-degree tilt?
Planetary dynamicists attribute Uranus's extreme 97.77° axial obliquity to one or two grazing collisions with an Earth-sized protoplanet early in solar system history (~4 billion years ago). Because the impact tipped Uranus past 90°, its rotation is technically retrograde (17 hours, 14 minutes, and 24 seconds), and its 13 rings and major moons orbit vertically around its equator like a giant Ferris wheel—giving each pole 42 continuous Earth years of sunlight followed by 42 years of winter darkness.
3. What is Verona Rupes on Uranus's moon Miranda?
Discovered by Voyager 2 during its January 1986 flyby, Verona Rupes on Miranda is the tallest known sheer cliff (fault scarp) in the solar system, plunging an estimated 15 to 20 kilometers (9 to 12 miles) — up to 10 times deeper than Earth's Grand Canyon. Because Miranda's surface gravity is only 0.077 m/s² (less than 1% of Earth's), an object dropped from the top of Verona Rupes would take roughly 12 minutes to reach the bottom, landing at about 200 km/h.
4. Why is Uranus's magnetic field tilted 59 degrees and offset from its center?
Unlike Earth, Jupiter, and Saturn whose magnetic fields are generated in deep central cores and roughly align with their rotation axes, Uranus's magnetic dipole is tilted by 58.6° from its spin axis and shifted by one-third of the planet's radius toward the south pole. This lopsided field is generated at shallow depths inside a convecting, electrically conductive ionic ocean of water, ammonia, and methane ("superionic ice"), causing the magnetosphere to corkscrew wildly every 17.24 hours.