What is special about Mercury?

Detailed Mercury Facts A year on Mercury is just 88 days long. One solar day (the time from noon to noon on the planet’s surface) on Mercury lasts the equivalent of 176 Earth days while the sidereal day (the time for 1 rotation in relation to a fixed point) lasts 59 Earth days. read more

Mercury is the closest planet to the Sun and is also the smallest of the eight planets in our solar system. For every 2 orbits of the Sun, which takes around 88 Earth days, Mercury completes three rotations of its axis. It is gravitationally locked and this rotation is unique to the solar system. read more

Mercury is the closest planet to the Sun and the second hottest and second smallest planet in the Solar System. One of Mercury's major features is the Caloris Basin. This large basin (or maria) has a diameter of 1300 kilometers. read more