Mercury is only slightly larger than Earth’s Moon. From the surface of Mercury, the Sun would appear more than three times as large as it does when viewed from Earth, and the sunlight would be as much as seven times brighter.

With a radius of 1,516 miles (2,440 kilometres), Mercury is a little more than 1/3 the width of Earth.

Mercury revolves around the sun at a whopping speed of 47 km/sec, faster than any other planet in our solar system.

Mercury spins slowly compared to Earth, so one day lasts a long time. Mercury takes 59 Earth days to make one full rotation. But a year on Mercury goes fast. Because it’s the closest planet to the sun, it goes around the Sun in just 88 Earth days.