Pluto Planet Problem

I’m going to come right out and ask the burning question: Is Pluto a Planet? No. At least under the current definition.  So the question becomes “Should Pluto be a planet?”  That answer is a bit more complicated.  Let’s look at the history.   Discovered by Clyde Tombaugh in 1930, Pluto was initially considered the ninth planet of our Solar System.  It was part of an intense search that follows back all the way to the discovery of Uranus and the orbital calculations that led to the discovery of Neptune.  Even after Neptune’s discovery, gravitational perturbations pointed to a ninth planet,...

Asteroid Belt vs. Kuiper Belt vs. Oort Cloud

Ever wondered the difference? The Asteroid Belt, shown above, consists of hundreds of thousands of rocks, with all kinds of different shapes, ranging in size from the Dwarf Planet Ceres at 950 Km in Diameter, down to small bits the size of dust particles.  It lies between Mars and Jupiter. The Kuiper Belt (pronounced Kai-per) consists of Icy rocks, and it a major source of short-period Comets in the Solar system.  Extending beyond the planet Neptune, Pluto was discovered to be one of the largest objects in the belt. The mysterious Oort cloud is a collection of Comets, thought to...