In order to be declared a planet, a celestial body must meet the following qualifications: It must orbit the sun, it must maintain a nearly spherical shape and have the necessary mass for self-gravity so that it does not succumb to rigid body forces, and it must clear the neighborhood around its orbit. All recognized planets in the solar system meet this definition.Know More
This definition of "planet" was most recently modified in August 2006 and is clearly defined in the International Astronomical Union Resolution 5. As result, Pluto is no longer considered a planet, and there are only eight recognized planets in the solar system. Unlike other planets, Pluto does not clear the neighborhood around its orbit, according to UCLA. Therefore, it is now classified as a "dwarf planet."
The criteria for a dwarf planet are similar to planets: It must orbit the sun; it must maintain a nearly spherical shape and have the necessary mass for self-gravity so that it does not succumb to rigid body forces; it does not clear the neighborhood around its orbit; and it is not a satellite.
In contrast to the other eight planets, Pluto is embedded in a swarm of similar celestial bodies and has many neighbors orbiting nearby. As a result, Pluto is now considered part of the trans-Neptunian population.Learn more about Planets
The planet Uranus takes about 84 Earth years or 30,660 Earth days to make a full orbit around the sun. Days on Uranus last 17 hours, which is the amount of time it takes for the ice giant to make a complete rotation on its axis. Uranus is around 1.8 billion miles from the sun, making it the seventh furthest planet from the sun in the solar system.Full Answer >
The planet Venus takes 224.7 Earth days to complete a single orbit of the sun. Venus is unique in that it rotates along its axis in the opposite direction of the other planets.Full Answer >
Pluto experiences four seasons that are determined by the tilt of the planet and its changing distance from the sun due to its eccentric orbit. As Pluto moves towards its furthest point from the sun and its north pole faces the sun, the northern hemisphere experiences summer.Full Answer >
While the distance between Saturn and the sun varies depending on Saturn's location along its orbit, it averages a distance of 886 million miles from the sun. Saturn is 838 million miles from the sun at the closest point in its orbit and 938 million miles away at its farthest.Full Answer >