Information and translations of planet in the most comprehensive dictionary definitions resource on … But the scientific definition was fairly loose until recently. is in orbit around the Sun, has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and; The idea of what exactly constitutes a planet of the solar system has been traditionally the product of historical and cultural consensus.Ancient sky gazers applied the term planet to the seven celestial bodies that were observed to move appreciably against the background of the apparently fixed stars. Definitions are created by people to describe the universe that surrounds us. Definition of a 'Planet': What makes something 'beautiful'? Planet definition: A planet is a large, round object in space that moves around a star. There is a definition. If 1, 2 & 3 below are unclear to a 6th grader then they need to work on their English more first. Watch this to learn more. What does planet mean? By 1930, nine planets had been discovered: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. They said a planet must do three things. The formal definition of planet, as voted on by the International Astronomical Union in 2006, is as follows: A planet is a celestial body that. The Earth is a... | Meaning, pronunciation, translations and examples Planets of the solar system. Astronomers define a planet as an object that orbits the sun (but not another object), is round (or nearly so) and has cleared the area around its orbit. It seems like an easy question. Planet definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Scientists spent a lot of time arguing over what a planet actually is. Saturn: Saturn is the second largest planet in our solar system, the sixth planet from the Sun and features an impressive system of rings. Some would have enough gravity to attract even more gas and dust, eventually forming planets. With the exception of Uranus and Neptune, each of these planets can be seen unaided. Pluto: Pluto was the furthest planet from the Sun until it was demoted from a planet to a dwarf planet in 2006. There are eight planets in the Solar System. Planet Facts. Definition of planet in the Definitions.net dictionary. "The definition of "planet" set in 2006 by the International Astronomical Union (IAU) states that in the Solar System a planet is a celestial body that: Or do you prefer a photograph? Look it up now! Or perhaps the first frog paper craft ever created by a beloved three year old is where beauty lies for you. But what exactly is a planet? After all, you’re standing on one right now! The planets in the Solar System have names of Greek or Roman gods, apart from Earth, because people did not think Earth was a planet in old times. The first thing might seem obvious—it has to orbit around the sun. Is a Picasso painting beautiful? Our solar system has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. All eight planets can be see through the use of an inexpensive amateur telescope or binoculars. Meaning of planet. In 2006, they came up with a definition.