Moons

459 CATALOGUED

Natural satellites, from worlds larger than Mercury to captured rocks a few kilometres across.

RANKED LISTS

Ganymede — 0.41 R⊕ · 2631 km

PRIMER — 60 SECONDS

Where the interesting ones are

The giant planets. Tidal flexing keeps Io molten and Europa's subsurface ocean liquid — energy that has nothing to do with sunlight.

Why the count keeps changing

Surveys keep finding small irregular satellites on distant, tilted orbits. The number of known moons is a statement about telescopes, not about the planets.

[

THE FAMOUS ONES

] 12 ENTRIES

NAME

CLASS

MASS

DISTANCE

MAG

CONSTELLATION

Moon of Jupiter

1 070 400 km · Jupiter

1 221 900 km · Saturn

Moon of Jupiter

1 882 700 km · Jupiter

Moon of Jupiter

421 800 km · Jupiter

384 400 km · Earth

Moon of Jupiter

8.03×10⁻³ M⊕

671 100 km · Jupiter

Moon of Neptune

3.58×10⁻³ M⊕

354 800 km · Neptune

3.02×10⁻⁴ M⊕

3 561 700 km · Saturn

1.08×10²⁰ kg

238 400 km · Saturn

3.75×10¹⁹ kg

186 000 km · Saturn

1.06×10¹⁶ kg

9375 km · Mars

1.44×10¹⁵ kg

23 457 km · Mars

ALL CLASSES MOON OF SATURN · 291 MOON OF JUPITER · 115 MOON OF URANUS · 29 MOON OF NEPTUNE · 16 MOON OF PLUTO · 5 MOON OF MARS · 2 MOON OF EARTH · 1

2.34×10⁷ km · Saturn

2.47×10⁷ km · Saturn

2.51×10⁷ km · Saturn

2×10⁷ km · Saturn

2.18×10⁷ km · Saturn

2.56×10⁷ km · Saturn

1.17×10⁷ km · Saturn

2.34×10⁷ km · Saturn

2.25×10⁷ km · Saturn

1.72×10⁷ km · Saturn

1.75×10⁷ km · Saturn

1.69×10⁷ km · Saturn

1.13×10⁷ km · Saturn

2.05×10⁷ km · Saturn

1.72×10⁷ km · Saturn

2.01×10⁷ km · Saturn

1.2×10⁷ km · Saturn

1.75×10⁷ km · Saturn

1.81×10⁷ km · Saturn

1.4×10⁷ km · Saturn

1.85×10⁷ km · Saturn

1.21×10⁷ km · Saturn

1.4×10⁷ km · Saturn

1.32×10⁷ km · Saturn

7 976 600 km · Uranus

Moon of Jupiter

2.35×10⁷ km · Jupiter

57 844 km · Uranus

Moon of Neptune

2.22×10⁷ km · Neptune

1.75×10⁷ km · Uranus

1.79×10⁷ km · Saturn

Moon of Jupiter

2.37×10⁷ km · Jupiter

1.56×10⁷ km · Saturn

1.76×10⁷ km · Saturn

2.14×10⁷ km · Saturn

Moon of Jupiter

2.35×10⁷ km · Jupiter

7 951 400 km · Uranus

43 200 km · Pluto

2.27×10⁷ km · Saturn

1.94×10⁷ km · Saturn

1.22×10⁷ km · Uranus

1.78×10⁷ km · Saturn

1.82×10⁷ km · Saturn

Moon of Jupiter

2.31×10⁷ km · Jupiter

295 000 km · Saturn

1.03×10⁻⁴ M⊕

295 000 km · Saturn

Moon of Neptune

3.53×10¹⁷ kg

50 100 km · Neptune

Moon of Jupiter

4.52×10¹⁷ kg

221 900 km · Jupiter

Moon of Jupiter

2.1×10⁷ km · Jupiter

Moon of Jupiter

7 397 000 km · Jupiter

2.36×10⁷ km · Saturn

2.03×10⁷ km · Saturn

Moon of Jupiter

2.1×10⁷ km · Jupiter

1 221 900 km · Saturn

5.69×10⁻⁴ M⊕

436 298 km · Uranus

8 502 600 km · Uranus

Moon of Neptune

3.58×10⁻³ M⊕

354 800 km · Neptune

2.13×10⁻⁴ M⊕

265 986 km · Uranus

Moon of Jupiter

1.87×10⁷ km · Jupiter

2.3×10⁷ km · Saturn