According to IAU, the planet is a celestial body that: orbit around the sun, has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium shape (almost round shape), has cleared the neighborhood around its orbit. The inner planets, the closest to the Sun, are solid spheres of …

From solarsystem.nasa.gov: National Aeronautics and Space Administration Page Last Updated: Aug. 3, 2017 Page Editor: Brian Dunbar NASA Official: Brian Dunbar. Planets, Moons and Dwarf Planets. Beyond Neptune, a newer class of smaller worlds called dwarf planets reign, including perennial favorite Pluto. Dwarf Planets vs Planets. Dark Energy and Dark Matter. Haumea is the 3rd closest dwarf planet to the sun and lives in the Kuiper belt. Here is a list of dwarf planets ordered in their distance from the Sun. Stars and Galaxies. The Planets and Dwarf Planets. Image Credit: NASA / JPL-Caltech / UCLA / MPS / DLR / IDA / Justin Cowart. A planet is a large space body which reflects the light of a star around which it revolves.The planets in our solar system are classified as inner planets and outer planets. Eris is the farthest away from the sun and Ceres is the closest to the sun. Take an interactive tour of the solar system, or browse the site to find fascinating information, facts, and data about our planets, the solar system, and beyond. Planets and dwarf planets of the solar system with sizes shown to scale / wikimedia.org What constitutes as a planet? The Nine Planets has been online since 1994 and was one of the first multimedia websites that appeared on the World Wide Web. While some dwarf planets have almost all of the characteristics of a planet, including having one or more moons, none discovered so far have rings. This was the question on the minds of astronomers around the world as the International Astronomical Union gathered in Prague, Czech Republic in 2006. The Search for Life and Exoplanets. Link. Facts and Figures. The IAU-recognized dwarf planets and their discovery dates Ceres (1801) Pluto (1930) Eris (2005) Makemake (2005) Haumea (2004) The five bodies recognized or named as dwarf planets by the IAU: Ceres as seen from the Dawn spacecraft.It is the only dwarf planet in the asteroid belt. Pluto is the largest dwarf planet in our solar system and they follow in size order with: Eris, Makemake, Haumea, and Ceres. Office of Inspector General. The outer planets are gas giants Jupiter and Saturn and ice giants Uranus and Neptune. Pluto was once a planet and was the 9th planet in the solar system until it was found to be a dwarf planet instead. Since the new definition, three objects in our solar system have been classified as dwarf planets: Pluto, Ceres and Eris. Approximate true-color image of Ceres, using the F7 ('red'), F2 ('green') and F8 ('blue') filters, projected onto a clear filter image. The dwarf planet is a whopping 3.7 billion miles (5.9 billion kilometers) from the sun, and its average temperature hovers around -356 degrees Fahrenheit (-215 degrees Celsius). Planets & Dwarf Planets in our Solar System Scroll down or CLICK for image map of the solar system with popup text descriptions Our SOLAR SYSTEM refers to the Sun in its centre with nine eight planets and their satellites (i.e., moons), asteroids, comets and meteoroids orbiting around the Sun. Pluto is the largest of the dwarf planets and has 5 moons. Explore in 3D—Eyes on the Solar System. A dwarf planet has not cleared the area around its orbit, while a planet has. The inner, rocky planets are Mercury, Venus, Earth and Mars.

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