☿️ Smallest Planet: Mercury
3rd Grade 🏆 World Records
Mercury is the smallest planet and the closest to the Sun. It is only a little bigger than Earth’s Moon.
Speedy planet
Mercury zooms around the Sun in just 88 days — that is one Mercury year.
Hot and cold
With almost no air to hold heat, Mercury is about 800°F in the day and about −290°F at night.
Quick quiz
Which planet is the smallest?
How long is a year on Mercury?
Mercury is about the size of…