Explore the Wonders of Our Universe

• Diameter: 1,391,000 km
• Mass: 1.989 × 10^30 kg
• Surface Temp: 5,500°C

The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core.

• Diameter: 4,879 km
• Orbital Period: 88 days
• Moons: 0

Mercury is the smallest and innermost planet in the Solar System. It completes an orbit around the Sun every 88 days.

• Diameter: 12,104 km
• Orbital Period: 225 days
• Moons: 0

Venus is the second planet from the Sun. It is similar to Earth in size and mass and often called Earth's "sister planet".

• Diameter: 12,742 km
• Orbital Period: 365.25 days
• Moons: 1

Earth is the third planet from the Sun and the only astronomical object known to harbor life. It is the densest planet in the Solar System.

• Diameter: 6,779 km
• Orbital Period: 687 days
• Moons: 2
• Temp: -65°C

Mars is the fourth planet from the Sun and the second-smallest planet. It is often referred to as the "Red Planet".

• Diameter: 139,820 km
• Orbital Period: 12 years
• Moons: 79
• Temp: -145°C

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.

• Diameter: 116,460 km
• Orbital Period: 29 years
• Moons: 82
• Temp: -178°C

Saturn is the sixth planet from the Sun and the second-largest in the Solar System. It is best known for its prominent ring system.

• Diameter: 50,724 km
• Orbital Period: 84 years
• Moons: 27
• Temp: -224°C

Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass.

• Diameter: 49,244 km
• Orbital Period: 165 years
• Moons: 14
• Temp: -218°C

Neptune is the eighth and farthest known planet from the Sun. It is the fourth-largest planet by diameter and the third-largest by mass.

• Diameter: 100,000 ly
• Stars: 100-400 billion
• Age: 13.61B years
• Sun's Distance: 27,200 ly

The Milky Way is the galaxy that contains our Solar System. It appears as a band of light in the night sky formed from stars that cannot be individually distinguished.