Ganymede
Ganymede is a natural satellite of Jupiter and contains a magnetic field generated by its partially liquid core.
5,262 kmMean diameterWorlds apart
Ganymede vs Mercury
What are they, and what does the difference actually look like?
Two things. One honest scale.
Meet the pair
What these two things are
Mercury
Mercury is a rocky planet orbiting closest to the Sun in the Solar System.
4,879 kmMean diameterGanymede has about 1.08 times the mean diameter of Mercury.
Both marked spans share one linear scale. Artwork keeps its proportions; poses and surface detail are illustrative.
Measurements, assumptions & sources +
Ganymede
Rounded mean-radius model of Ganymede. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
NASA JPL — Planetary satellite physical parameters
The marked mean diameter is calibrated. Unmeasured illustration details are representative.
Mercury
Mean-radius spherical model for Mercury; actual shape is not perfectly spherical.
NASA JPL — planetary physical parameters
The marked mean diameter is calibrated. Unmeasured illustration details are representative.
Change the comparison
Put something else beside it.
Measurement details
Why these numbers?
The visual compares mean diameter with mean diameter. The records below preserve each value’s basis and caveats.
Ganymede
5,262 kmMean diameter · approximate
Rounded mean-radius model of Ganymede. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
Mercury
4,879 kmMean diameter · approximate
Mean-radius spherical model for Mercury; actual shape is not perfectly spherical.
- Comparing
- Mean diameter ↔ Mean diameter
- Relative size
- Ganymede is larger on this measurement by a factor of about 1.08. Ganymede's selected measurement is approximately 7.86% greater than Mercury's.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Ganymede is labelled approximate; treat the displayed value as a comparison anchor rather than false precision.
- Mercury is labelled approximate; treat the displayed value as a comparison anchor rather than false precision.
There’s always another scale
Follow your curiosity.
SpaceGanymede5,262 kmGanymede is a natural satellite of Jupiter and contains a magnetic field generated by its partially liquid core.SpaceMercury4,879 kmMercury is a rocky planet orbiting closest to the Sun in the Solar System.
SpaceMoon3,475 kmThe Moon is Earth’s natural satellite and the brightest large object in Earth’s night sky.
SpaceEarth12,740 kmEarth is the rocky planet on which we live and the third planet from the Sun.
SpacePluto2,377 kmPluto is a dwarf planet in the Kuiper Belt, composed of rock and ice and orbiting the Sun.
SpaceJupiter139,800 kmJupiter is a giant planet composed mainly of hydrogen and helium, orbiting the Sun beyond the asteroid belt.
SpaceSun1,391,000 kmThe Sun is the star at the centre of the Solar System.Side by side
Another point of view.
