'At 3,031 miles in diameter, this planet is the second smallest in our solar system'
Mercury
THE PLANETS: At 3,031 miles in diameter, this planet is the second smallest in our solar system
At 3,031 miles in diameter, this planet is the second smallest in our solar system
At 3,031 miles in diameter, this planet is the second smallest in our solar system
THE PLANETS
Mercury
THE PLANETS