Mercury

Mercury is the closest planet to the Sun and the smallest in our solar system.

Mercury has almost no atmosphere and experiences extreme temperature changes. It was formed approximately 4.5 billion years ago.

Mercury Facts

• Diameter: 4,880 km
• Mass: 3.30 × 10^23 kg
• Moons: 0
• Distance from Sun: 57.9 million km
• Orbit Period: 88 days
• Surface Temperature: -173°C to 427°C