Pluto – You still there ?
Pluto (minor planet designation: 134340 Pluto) is an icy dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It was the first and the largest Kuiper belt object to be discovered.
Mass: 1.30 ×10^23 kg
Radius: 1,188 Km
Density: 1.854 g/cm^3
Escape Velocity: 0.62 km/sec
Gravity: 1.212 m/s^2
Distance from Sun: 39.5 astronomical units (328.2 light minutes)
Pluto was discovered by Clyde Tombaugh in 1930 and declared to be the ninth planet from the Sun. After 1992, its status as a planet was questioned as it didn’t fall under the definition of planet and was removed from the position of planet in 2006.
It has five known moons: Charon (the largest, with a diameter just over half that of Pluto), Styx, Nix, Kerberos, and Hydra. Pluto and Charon are sometimes considered a binary system because the barycenter of their orbits does not lie within either body. In 1978, the discovery of Pluto’s moon Charon allowed the measurement of Pluto’s mass for the first time: roughly 0.2% that of Earth, and far too small to account for the discrepancies in the orbit of Uranus. One day on Pluto lasts for 153 hours and it takes 248 Earth years to complete one revolution.
Bonus Fact : Due to its orbit, Pluto periodically comes closer to the Sun than Neptune. A stable orbital resonance with Neptune prevents them from colliding