The smallest planet in our solar system and nearest to the Sun, Mercury is only slightly larger than Earth's moon.
This planet is about in diameter. Thus it is only slightly bigger than Earth's moon.
It is also smaller than both Saturn's moon, Titan and Jupiter's moon.
From 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.
Despite its closeness to the Sun, Mercury is not the hottest planet in our solar system – that title belongs to nearby Venus.
The magnetic field of Mercury is different at its poles.