Charon is about half the size of Pluto. I find it very interesting that 4 out of five of Pluto’s moons orbit the Pluto-Charon double planet(oid) rather than all the moons just orbiting Pluto. Pluto, once the smallest planet, now reclassified as a dwarf planet, has five known moons and orbits the Sun just like other planets. Cool facts about Pluto, the Kuiper Belt and the first mission to explore this mysterious region. Pluto’s moon Charon is the largest, having around half of Pluto’s diameter. Pluto has a radius of 1.185 kilometers / 737 miles, thus it is 1/6 the width of Earth and a diameter of 2.326 km / 1.445 mi. Click for even more interesting facts and information on Pluto. Due to its massive size, Pluto and Charon are often called the double planet. Pluto. As of 2020, it is the smallest known moon of Pluto.It was imaged along with Pluto and Pluto's other moons by the New Horizons spacecraft in July 2015. Moons of Pluto. Fun Facts. 30+ Facts About Pluto For Kids. The two newly discovered moons are natural satellites. Pluto is tiny, only about half the width of the United States . More Fun Facts About Pluto: Pluto is only about half the width of the United States. In the next section, we present more such facts about Pluto. But Pluto does not. Pluto’s most giant moon: Charon is almost half the size of Pluto. Pluto is the largest known dwarf planet in the Solar System, discovered in 1930. Styx is a small natural satellite of Pluto whose discovery was announced on 11 July 2012. Pluto’s radius is a mere 715 miles (1,151km), which is almost one-sixth of Earth’s width. At least until July 2011, then another one a year later in 2012 that two additional moons were seen through the Hubble Telescope. Styx is the second-closest known satellite to Pluto, and the fifth discovered. That brings the total moons of Pluto to five. Pluto has mountains, valleys, and craters. Pluto is named after the Greek god of the underworld. Pluto was not discovered until the year 1930. Charon is the largest moon compared to the body it orbits (whether planet or dwarf planet) of any moon in the solar system. A person on Pluto would weigh 1/15 what they weigh on Earth - for comparison, the astronauts on the Moon had 1/6 of their Earth weight. Here are some more interesting attributes of Pluto. Pluto is 1,473 miles in diameter, according to recent measurements obtained from New Horizons, while Earth’s moon has a diameter of 2,160 miles. Almost all the planets travel around the sun in nearly perfect circles. Charon is the biggest known moon of any dwarf planet. Pluto orbits the Sun once every 248 years. Pluto was discovered by Clyde Tombaugh when he was just 24 years old. There were three known moons of Pluto: Charon, Nix and Hydra. A single image was returned. Pluto is 18.5% the size of Earth.