Charon is the largest moon compared to the body it orbits (whether planet or dwarf planet) of any moon in the solar system. Styx is a small natural satellite of Pluto whose discovery was announced on 11 July 2012. 30+ Facts About Pluto For Kids. Here are some more interesting attributes of Pluto. 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. That brings the total moons of Pluto to five. Charon is the biggest known moon of any dwarf planet. Pluto orbits the Sun once every 248 years. Pluto is 18.5% the size of Earth. Pluto, once the smallest planet, now reclassified as a dwarf planet, has five known moons and orbits the Sun just like other planets. In the next section, we present more such facts about Pluto. Styx is the second-closest known satellite to Pluto, and the fifth discovered. There were three known moons of Pluto: Charon, Nix and Hydra. Pluto was not discovered until the year 1930. Pluto is tiny, only about half the width of the United States . Pluto. Pluto’s moon Charon is the largest, having around half of Pluto’s diameter. Charon is about half the size of Pluto. 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. Due to its massive size, Pluto and Charon are often called the double planet. A single image was returned. Almost all the planets travel around the sun in nearly perfect circles. More Fun Facts About Pluto: Pluto is only about half the width of the United States. 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. Pluto is the largest known dwarf planet in the Solar System, discovered in 1930. Pluto was discovered by Clyde Tombaugh when he was just 24 years old. Pluto’s most giant moon: Charon is almost half the size of Pluto. At least until July 2011, then another one a year later in 2012 that two additional moons were seen through the Hubble Telescope. Fun Facts. The two newly discovered moons are natural satellites. Pluto’s radius is a mere 715 miles (1,151km), which is almost one-sixth of Earth’s width. Pluto has mountains, valleys, and craters. But Pluto does not. Moons 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. Cool facts about Pluto, the Kuiper Belt and the first mission to explore this mysterious region. 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. Click for even more interesting facts and information on Pluto. Pluto is named after the Greek god of the underworld.