But, after more than 60 years as a planet, Pluto suffered the indignity of being downgraded to a mere object in 1992. It was found to be part of the Kuiper Belt, a swirling chaos of space debris. Some charts now started to show Neptune as the furthest planet from the Sun instead of Pluto, which was sometimes omitted altogether. Eventually, the highly respected International Astronomical Union designated Pluto as a dwarf planet.
So what else do we know about Pluto? Firstly, it is really quite small, with a width only about half that of the U.S. landmass. The dwarf planet’s complete orbit around the Sun takes about 248 Earth years. Consequently, one Pluto day equates to about six and a half days on our planet. Pluto has five moons, and the largest, Charon, is about half its size. Nevertheless, there is a lot more for us to discover about the dwarf planet.