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The Windiest Planet
Dark, cold and whipped by supersonic winds, Neptune is the last of the hydrogen and helium gas giants in our solar system. More than 30 times as far from the sun as Earth, the planet takes almost 165 Earth years to orbit our sun. In 2011 Neptune completed its first orbit since its discovery in 1846.

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  About Neptune Moons Facts & Figures Neptune vs. ... Missions FAQ

Comparison: Neptune vs. Earth

This chart shows the differences between Neptune and Earth. To change the planets/moons being compared, change one or more of the form fields at the bottom and click Refresh.

Discovered By
Urbain Le Verrier, John Couch Adams, Johann Galle
Known by the Ancients
Date of Discovery
23 September 1846
Unknown
Average Orbit Distance
4,498,396,441 km
149,598,262 km
Perihelion (closest)
4,459,753,056 km
147,098,291 km
Aphelion (farthest)
4,537,039,826 km
152,098,233 km
Equatorial Radius
24,622 km
6,371.00 km
Equatorial Circumference
154,704.6 km
40,030.2 km
Volume
62,525,703,987,421 km3
1,083,206,916,846 km3
Mass
102,410,000,000,000,000,000,000,000 kg
5,972,190,000,000,000,000,000,000 kg
Density
1.638 g/cm3
5.513 g/cm3
Surface Area
7,618,272,763 km2
510,064,472 km2
Equatorial Surface Gravity
11.15 m/s2
9.80665 m/s2
Escape Velocity
84,816 km/h
40,284 km/h
Rotation Period (Length of Day)
0.671 sidereal days
0.99726968 sidereal days
Mean Orbit Velocity
19,566 km/h
107,218 km/h
Orbit Eccentricity
0.00859048
0.01671123
Orbit Inclination to Ecliptic
1.77 degrees
0.00005 degrees
Equatorial Inclination to Orbit
28.3 degrees
23.4393 degrees
Orbit Circumference
28,263,736,967 km
939,887,974 km
Atmospheric Constituents
Hydrogen, Helium, Methane
Nitrogen, Oxygen

 

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System of measurement:

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Comparison: Neptune vs. Earth

This chart shows the differences between Neptune and Earth. To change the planets/moons being compared, change one or more of the form fields at the bottom and click Refresh.

Discovered By
Urbain Le Verrier, John Couch Adams, Johann Galle
Known by the Ancients
Date of Discovery
23 September 1846
Unknown
Average Orbit Distance
4,498,396,441 km
149,598,262 km
Perihelion (closest)
4,459,753,056 km
147,098,291 km
Aphelion (farthest)
4,537,039,826 km
152,098,233 km
Equatorial Radius
24,622 km
6,371.00 km
Equatorial Circumference
154,704.6 km
40,030.2 km
Volume
62,525,703,987,421 km3
1,083,206,916,846 km3
Mass
102,410,000,000,000,000,000,000,000 kg
5,972,190,000,000,000,000,000,000 kg
Density
1.638 g/cm3
5.513 g/cm3
Surface Area
7,618,272,763 km2
510,064,472 km2
Equatorial Surface Gravity
11.15 m/s2
9.80665 m/s2
Escape Velocity
84,816 km/h
40,284 km/h
Rotation Period (Length of Day)
0.671 sidereal days
0.99726968 sidereal days
Mean Orbit Velocity
19,566 km/h
107,218 km/h
Orbit Eccentricity
0.00859048
0.01671123
Orbit Inclination to Ecliptic
1.77 degrees
0.00005 degrees
Equatorial Inclination to Orbit
28.3 degrees
23.4393 degrees
Orbit Circumference
28,263,736,967 km
939,887,974 km
Atmospheric Constituents
Hydrogen, Helium, Methane
Nitrogen, Oxygen

 

New planets/moons to compare:

System of measurement:

Compare All Eight Planets