Pluto is only slightly over 1400 miles wide, about half the width of the continental United States. From its discovery in 1930 until 2006, Pluto was the ninth planet of the solar system, but in 2006, it was demoted to dw... More » Science Astronomy Planets

Although no one knows exactly what Pluto is made of, most scientists agree that it is between 50 and 70 percent rock, with the remainder being composed of various ices. Pluto’s core is composed of dense rock, while the i... More »

NASA states that Pluto's mass is approximately 13,100,000 trillion tons. Pluto's diameter is 1,413 miles or 2,274 kilometers, making it under a sixth of the width of Earth. More » Science Astronomy Planets

Pluto has a volume of about 1.53 cubic miles, a radius of 715.2 miles, a surface area of 6.42 million miles and an equatorial circumference of 4,493.7 miles. It is only 0.006 times as voluminous as Earth. More » Science Astronomy Planets

Pluto has an average radius of 715 miles. The planetary body is 20 percent smaller than Earth and it has a diameter of 1,430 miles. More » Science Astronomy Planets

Pluto is 4.67 billion miles away from Earth. At a certain condition, the two celestial bodies are only 2.66 billion miles apart. NASA sent the New Horizons spacecraft on a mission to visit Pluto, and it is expected to re... More » Science Astronomy Planets

Pluto has a diameter of 1,430 miles, which is six times less than that of Earth. Pluto is smaller than the Earth's moon. In 2006, Pluto was stripped of its status as one of the Solar System's nine planets, and given a ne... More »