Height: ~4-5 km
Base diameter: ~20 km
Type: Cryovolcanic dome (ice/mud)
Age: <200 million years
Status: Preparing the 3D scene...
Ahuna Mons is Ceres' lonely mountain - a ~4-5 km tall cryovolcanic dome discovered by NASA's Dawn spacecraft. The numbers below are real measurements from the mission. Sizes and proportions are compressed for teaching clarity.
Ceres 3D Explorer - Ahuna Mons Cryovolcano
Last reviewed: July 29, 2026 · By: FreeToolOnline (NASA/JPL data)
Ahuna Mons is a 4-5 km tall cryovolcanic dome on the dwarf planet Ceres - the closest cryovolcano to the Sun and one of the most geologically young features in the solar system. Explore it in 3D with real NASA measurements and scale comparisons against familiar mountains and volcanoes.
What is Ahuna Mons?
Ahuna Mons rises from Ceres' surface like a solitary peak. Discovered by NASA's Dawn spacecraft (2015-2018), this cryovolcanic dome is believed to be made of ice-rich mud and briny material, not molten rock. Its height (4-5 km) and base diameter (~20 km) are modest compared to Earth mountains, but on a small dwarf planet like Ceres (950 km diameter), it stands out dramatically. The dome's bright streaks are thought to be exposed salts left behind after the erupted material partially sublimated or flowed.
Real Scale & Age
| Measurement | Value | For Reference |
|---|---|---|
| Ahuna Mons height | 4-5 km above surrounding terrain | Mont Blanc (4.8 km); Olympus Mons, Mars (21 km) |
| Base diameter | ~20 km | Similar footprint to Mont Blanc |
| Age | <200 million years (crater-count dating) | Geologically very young - possibly much younger |
| Composition | Cryovolcanic ice-mud dome with salt deposits | NOT molten rock - an icy/briny extrusion |
| Ceres diameter | 950 km (dwarf planet) | 1/14 the size of Earth's Moon |
Why Cryovolcanism?
In the cold outer solar system, "volcanism" takes on a different meaning. Instead of molten rock, cryovolcanoes erupt with ice, water, and other frozen volatiles. On Ceres - orbiting in the asteroid belt between Mars and Jupiter - internal heat can melt subsurface ice layers. When the pressure builds, this icy slurry is forced upward, creating cryovolcanic domes like Ahuna Mons. Over time, the exposed material sublimated or weathered, leaving behind the bright, salt-crusted dome we see today.
The Geometry: Why So Steep?
Ceres' gravity is extremely weak (only ~2.8% of Earth's). This allows ice-rich material to hold steep slopes without flowing. On Earth, a 4-5 km peak must be built with sloped, stable sides; Ahuna Mons can be a more abrupt cone - a small mountain's worth of material piled in a compact mound. The 3D explorer above uses vertical exaggeration to make this structure visible at the scale of the scene.
The approximation disclosures: on-screen sizes and distances are NOT to scale. The numbers in the table above are real NASA/JPL measurements. This visualizer is tuned to teach the feature's location and relative geometry, not to simulate physics.
One of Many - But the Loneliest
Ceres' surface hosts roughly two dozen candidate cryovolcanic domes, but Ahuna Mons is by far the most prominent and isolated. Others are either smaller, degraded by impacts, or clustered in multi-feature complexes. Ahuna stands alone - hence the nickname "the lonely mountain of Ceres."
Privacy & How It Works
This explorer runs entirely in your browser using WebGL and procedural three.js geometry. No data is uploaded; no server processing occurs. The scene is rendered client-side and cached offline after your first visit.
Frequently Asked Questions
What makes Ahuna Mons unique?
Ahuna Mons is the most prominent and isolated cryovolcanic dome on Ceres. Unlike other candidate cryovolcanoes on the dwarf planet (roughly two dozen), Ahuna stands alone and shows clear stratovolcano-like geometry. Its young age - under 240 million years, possibly much younger - makes it one of the most geologically active features in the outer solar system.
How tall is Ahuna Mons really?
Ahuna Mons rises 4-5 km above the surrounding terrain on Ceres. This is similar in height to Mont Blanc (4.8 km, the highest peak in the Alps), but much smaller than Olympus Mons on Mars (21 km tall). On Ceres' weak gravity, this height is more dramatic relative to the dwarf planet's size.
Is Ahuna Mons an active volcano right now?
There is no evidence of current activity. Ahuna Mons' young age (possibly billions of years after Ceres' formation) suggests it erupted recently by geological timescales, but NASA's Dawn spacecraft found no signs of ongoing outgassing or thermal anomalies during its 2015-2018 mission.
What does a cryovolcano erupt?
Instead of molten rock, cryovolcanoes erupt with ice, water, methane, or other frozen volatiles. On Ceres, the erupted material is believed to be briny mud and ice - a slushy, partially solid mixture driven upward by internal pressure. Over time, this material sublimated or weathered, leaving behind the hard, bright dome we observe today.
Why is the explorer using "vertical exaggeration"?
Ceres' gravity is very weak (2.8% of Earth's), allowing steep slopes to exist naturally. However, at the scale of the 3D scene, a 4-5 km mound on a 950 km sphere would be invisibly small. Vertical exaggeration magnifies this feature so you can see its shape and structure. The actual measurements are shown in the facts table.
Could Ceres have a subsurface ocean?
Yes. Dawn's data suggests Ceres may harbor a subsurface ocean of salty water beneath its crust. This ocean could be the source of the material that erupted to form Ahuna Mons and other cryovolcanic features. If true, Ceres would be an ocean world - and potentially a place to search for signs of life in the solar system.
How do we know Ahuna Mons' age?
Scientists count impact craters on and around Ahuna Mons. Older surfaces have more craters; younger surfaces have fewer. The crater density indicates Ahuna is less than 240 million years old. Some estimates place it much younger - possibly tens of millions of years old - making it among the youngest features in the solar system.