Planet Moon Count Comparison (Confirmed Moons)
Which solar planet owns the most confirmed moons right now? Compare 8 IAU counts from NASA data, from 0 Mercury rocks to 285 Saturn ringed rocks total.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Mercury Too close to keep any. | 0 moons | Sun scorched rock | NASA planet facts: Mercury 0 moons |
| Venus Ties Mercury. | 0 moons | Cloud shrouded rock | NASA planet facts: Venus 0 moons |
| Earth Tide locked partner. | 1 moons | One large moon | NASA planet facts: Earth 1 moon |
| Mars Captured asteroids. | 2 moons | Phobos Deimos pair | NASA planet facts: Mars 2 moons |
| Neptune Triton rivals Pluto. | 16 moons | Triton system | NASA Space Place Apr 2025: Neptune 16 |
| Uranus Half ice moons. | 28 moons | Tilted ice giant | NASA Space Place Apr 2025: Uranus 28 |
| Jupiter Ganymede beats Mercury. | 101 moons | Galilean giant system | IAU MPC Mar 2026: Jupiter 101 moons |
| Saturn Most by far. 1 km rocks. | 285 moons | Ringed record holder | IAU MPC Mar 2026: Saturn 285 moons |
About this converter
Planet moon counts run 0 to 285 with survey telescopes rewriting the outer board. Mercury and Venus hold 0 each, too close to the Sun to keep any. Earth holds 1 large tide locked partner. Mars holds 2 captured asteroids in Phobos and Deimos. Neptune at 16 and Uranus at 28 cover the ice giants with Triton near Pluto size. Jupiter reached 101 in March 2026 with four new irregulars. Saturn reached 285 in March 2026 with 11 new kilometer rocks, after 128 joined in March 2025. Counts come from NASA planet fact pages with IAU Minor Planet Center circulars. Dwarf planet moons stay out of this planet table.
How to use it
Pick two planets and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. One box holds a count of the first planet, one holds the matching count of the second, one holds the moons in the chosen unit. Try 1 Saturn against Jupiters to compare record against rival.
Counts are IAU confirmed moons as of March 2026. Surveys keep adding kilometer rocks, so outer counts move yearly.
FAQ
Which planet has most moons?
Saturn with 285 confirmed.
How many moons does Jupiter have?
101 confirmed as of March 2026.
Which planets have none?
Mercury and Venus.
Do counts change?
Yes. Surveys add small rocks yearly.
Sources
- NASA planet fact pages (Mercury 0 to Mars 2 moons)
- NASA Space Place Apr 2025 (Uranus 28, Neptune 16 moons)
- IAU Minor Planet Center Mar 2026 circulars (Saturn 285, Jupiter 101 moons)
Last verified: 2026-10-05 · 8 entries
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