PlanetsMercury
All Planets

Mercury

terrestrial planet

Mercury is the smallest planet in our solar system and the closest to the Sun. Its surface is heavily cratered and resembles Earth's Moon. Despite being closest to the Sun, it is not the hottest planet.

Fun Fact

A day on Mercury (sunrise to sunrise) lasts 176 Earth days, while its year is only 88 Earth days.

Type

terrestrial

Diameter

4,879 km

Temperature

167°C

Moons

0

Rings

No

Gravity

3.7 m/s²

Venus

Data sources: NASA Jet Propulsion Laboratory, ESA, International Astronomical Union. Orbital mechanics from NASA/JPL Horizons system.