Uranus and Neptune – planet comparison | Uranus vs Neptune

Uranus and Neptune are the last two planets of the Solar System. Referred as “Ice giants”, both these planets are huge with many things in common. The following is a comparison between Uranus and Neptune. Let’s read.


Uranus vs Neptune – planet comparison

Uranus and Neptune comparison

Which planet is bigger, Uranus or Neptune?

Uranus has a bigger diameter as compared with Neptune. Uranus is thus the third biggest planet in our Solar System after Jupiter and Saturn.

  • Radius of Uranus – 25,362 km (15,759.2 miles)
  • Radius of Neptune – 24,622 km (15,299.4 miles)

Which planet has more moons, Uranus or Neptune?

There are 28 known moons of Uranus. Uranus has the third highest number of moons after Saturn and Jupiter. Neptune has 16 known moons. The number of moons of the gas giants may increase as modern telescopes discover new moons.

Which planet has more mass?

Although Uranus is bigger in diameter, Neptune is more massive.


  • Mass of Uranus – 8.681 × 10^25 kg
  • Mass of Neptune – 10.24 × 10^25 kg

Does Uranus have rings?

Yes, Uranus also has rings around it. Moreover, all the four gas giants – Jupiter, Saturn, Uranus, and Neptune have rings.

Rings of Uranus
Rings of Uranus

Does Neptune have rings?

Yes, Neptune have at least 5 main rings. The rings of Neptune are very faint made of small rocks and dust.

Rings of Neptune
Rings of Neptune

Which planet is more dense?

Both Uranus and Neptune have very low densities. Among the four gas giants, Neptune is the densest.

  • Density of Uranus – 1.27 g/cm³
  • Density of Neptune – 1.64 g/cm³

Comparison table

Radius25,362 km (15,759.2 miles)24,622 km (15,299.4 miles)
Size rank3rd4th
Mass rank4th3rd
Position from the Sun7th8th
Number of moons2816
Day length17 hours 14 minutes16 hours
Year length84 Earth years165 Earth years
Compositionmostly water, ammonia, and methane (Atmosphere is mostly hydrogen, helium, and methane)mostly water, ammonia, and methane (Atmosphere is mostly hydrogen, helium, and methane)
Distance from the Sun2.9 billion kilometers (1.8 billion miles)4.5 billion kilometers (2.8 billion miles)
Mass comparison to Earthequal to 14.5 Earthsequal to 17.1 Earths
Volume comparison to Earthequal to 63 Earthsequal to 57 Earths
Planet typeGas/Ice giantGas/Ice giant
Ring systemYesYes
Named afterthe Greek god of the skythe Roman god of the seas
Surfacedoesn’t have a true solid surfacedoesn’t have a true solid surface
Time taken by sunlight to reacharound 2 hours 40 minutesaround 4.1 hours

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