FIELD GUIDE
Mercury
The swift messenger
The smallest planet in our solar system and closest to the Sun. Mercury is only slightly larger than Earth's Moon and has virtually no atmosphere to retain heat.
Explore in the Voyage →Stats
- DIAMETER
- 4,879 km
- DISTANCE FROM SUN
- 57.9 million km
- DAY LENGTH
- 4,222.6 hours
- TEMPERATURE
- -180°C to 430°C
Facts
A year on Mercury is just 88 Earth days
Despite being closest to the Sun, it's not the hottest planet
Mercury has no atmosphere, no moons, and no rings
Its surface temperature swings by over 600°C between day and night
Mission — Ice & Iron
The closest world to the Sun hides ice in the dark and an iron heart beneath a battered grey crust.
IN THIS MISSION:
- The Great Scar
- Ice in the Dark
- The Iron Heart