Mercury is a planet in the Solar System which is located closer to the Sun than any other. Due to this closeness to the Sun, Mercury can only be seen from Earth when it’s twilight.
A year on Mercury lasts exactly 88 days. With the time being near the Sun, Mercury has decreased its speed to be equal to the Sun’s orbit. 1 day on Mercury is equal to 176 days on our planet – Earth.
Mercury is the smallest planet in the Solar System from all 12 planets.
The fact that Mercury is made out of rocks makes it the most solid planet after Earth.
The core of Mercury is bigger and lighter than Earth. While Earth’s core makes up 17% of the planet, Mercury’s core is near 42%.