Mercury
The smallest planet, closest to the Sun
Size
4,879 km
Distance from Sun
57.9 million km
Day Length
59 Earth days
Year Length
88 Earth days
Moons
0
Temperature
-180 to 430 °C
Fun Facts
Mercury is the smallest planet in our solar system — only a little bigger than Earth's Moon!
A day on Mercury (sunrise to sunrise) lasts 176 Earth days, but a year is only 88 days!
Mercury has no atmosphere, so there's no weather — no wind, no rain, no clouds.