Size comparison: Earth vs Neptune

Size comparison between Earth and Neptune. We do not have many high quality images of Neptune because this planet was only visited by Voyager 2 on August 25, 1989. This planet is 4 times the size of Earth. Neptune's orbital period lasts 164 Earth years. The planet turns on itself in 16 hours. The temperature is very cold. Neptune is 30 times farther from the Sun than the Earth. Its composition is essentially made of hydrogen and helium. Over 14 moons levitate around Neptune.

Object	Earth	Neptune
Type	Rocky planet	Gaseous planet
Age	4.54 billion years	4.5 billion years
Population	7.7 billion	0
Diameter	12,742 km	49,244 km
Mean radius	6,371 km	24,622 km
Mass	5.97 × 1024 kg	1.02 × 1026 kg
Orbital period	365 days	164.8 years
Rotation duration	24 hours	16 hours
Surface temperature (average)	288 K 14.9 °C 58.7 °F	55 K -218 °C -360 °F
Surface gravity	9.8 m/s²	11.15 m/s²
Mean density	5.5 g/cm3	1.63 g/cm3
Orbital distance	150 million km	4.5 billion km
Circumference	40,075 km	154,704 km
Surface area	510 million km²	7.6 × 109 km2
Volume	1.08 × 1012 km3	62.5 × 1012 km3
Escape velocity	11.1 km/s	23.5 km/s
Average orbital speed	29.78 km/s	5.43 km/s
Aphelion	152 million km	4.54 billion km
Perihelion	147 million km	4.46 billion km
Semi major axis	149 million km	4.50 billion km
Inclination	7.1°	1.77°
Satellites	1 natural satellite 5 quasi-satellites 1,800 artificial satellites	14 natural satellites 1 quasi-satellite 0 artificial satellite
Surface pressure	101.3 kPa	1 Pa
Atmosphere composition	78% nitrogen (N2), 21% oxygen (O2), ~ 1% water vapor, 0.9% argon, 0.04% carbon dioxide	80% hydrogen, 19% helium, 1.5% methane, 0.019% hydrogen deuteride
Distance from the Milky Way center	27,200 light years	27,200 light years

Note: if one of the objects is not visible, it just means that it is too tiny to be displayed compared to the other one.