Planet Mercury

Terrestrial Planet

Mercury
Mercury is the closest planet to the Sun, and the smallest planet in our solar system.
It's only slightly larger than Earth's Moon.
Mercury is the fastest planet, zipping around the Sun every 88 Earth days.

Because Mercury is so close to the Sun, day temperatures can reach highs of 430°C.
Without an atmosphere to retain that heat at night, temperatures can dip as low as -180°C.

Despite its proximity to the Sun, Mercury is not the hottest planet in our solar system – that title belongs to nearby Venus, thanks to its dense atmosphere.
But Mercury is the fastest planet, zipping around the Sun every 88 Earth days.

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

From an average distance of 58 million kilometers, Mercury is 0.4 astronomical units away from the Sun.
One astronomical unit = distance from the Sun to Earth.
From this distance, it takes sunlight 3.2 minutes to travel from the Sun to Mercury.

Mercury doesn't have moons.

Mercury formed about 4.5 billion years ago w

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