Our Solar System

The Sun


1.391 million km


Mercury is the smallest and innermost planet in the Solar System. Its orbital period around the Sun of 87.97 days is the shortest of all the planets in the Solar System. It is named after the Roman deity Mercury, the messenger of the gods. 
Distance from Sun57.91 million km
Orbital period88 days
Length of day58d 15h 30m
Mass3.285 × 10^23 kg (0.055 M⊕)


Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. It has the longest rotation period of any planet in the Solar System and rotates in the opposite direction to most other planets. It does not have any natural satellites. It is named after the Roman goddess of love and beauty. 
Distance from Sun108.2 million km
Orbital period225 days
Length of day116d 18h 0m
Equatorial rotation velocity6.52 km/h (1.81 m/s)


Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth’s gravity interacts with other objects in space, especially the Sun and the Moon, Earth’s only natural satellite.
Surface area510.1 million km²
Land area148.9 million km²
Mass5.972 × 10^24 kg
Orbital period365 days


Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.
Distance from Sun227.9 million km
Orbital period687 days
Surface pressure0.636 (0.4–0.87) kPa; 0.00628 atm


Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a gas giant with a mass one-thousandth that of the Sun, but two-and-a-half times that of all the other planets in the Solar System combined. Jupiter has been known to astronomers since antiquity.  
Distance from Sun778.5 million km
Orbital period12 years
Radius69,911 km
Mass1.898 × 10^27 kg (317.8 M⊕)


Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius about nine times that of Earth. It has only one-eighth the average density of Earth; however, with its larger volume, Saturn is over 95 times more massive.
Distance from Sun1.434 billion km
Orbital period29 years
Radius58,232 km
Mass5.683 × 10^26 kg (95.16 M⊕)


Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both have bulk chemical compositions which differ from that of the larger gas giants Jupiter and Saturn. 
Distance from Sun2.871 billion km
Orbital period84 years
Radius25,362 km
Mass8.681 × 10^25 kg (14.54 M⊕)


Neptune is the eighth and farthest known planet from the Sun in the Solar System. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. Neptune is 17 times the mass of Earth, slightly more massive than its near-twin Uranus. 
Distance from Sun4.495 billion km
Orbital period165 years
Radius24,622 km
Mass1.024 × 10^26 kg (17.15 M⊕)