TOP 5

Which Planet Has the Longest Year?

1 ERIS

Solar orbit period: 557 Earth years Distance to Sun: 5.65-14.6 bn km Orbital speed: 3.4 km/s*

2 MAKEMAKE

Solar orbit period: 310 Earth years Distance to Sun: 5.76-7.939 bn km Orbital speed: 4.4 km/s*

3 HAUMEA

Solar orbit period: 285 Earth years Distance to Sun: 5.194-7.71 bn km Orbital speed: 4.48 km/s*

4 PLUTO

Solar orbit period: 248 Earth years Distance to Sun: 4.4-7.3 bn km Orbital speed: 4.7 km/s*

5 NEPTUNE

Solar orbit period: 165 Earth years Distance to Sun: Approx. 4.5 bn km Orbital speed: 5.43 km/s* * On average. By comparison, Earth orbits at a speed of 30 km/s.