Image: Wikimedia Commons

planet

Celestial body directly orbiting a star or stellar remnant

Also known as planetary body · planets

Instance of: astronomical object type
Subclass of: planetary-mass object
, substellar object
Part of: planetary system

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

A planet is a large, rounded astronomical body that is generally required to be in orbit around a star, stellar remnant, or brown dwarf, and is not one itself. The Solar System has eight planets by the most restrictive definition of the term: the terrestrial planets Mercury, Venus, Earth, and Mars, and the giant planets Jupiter, Saturn, Uranus, and Neptune. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a protoplanetary disk. Planets grow in this disk by the gradual accumulation of material driven by gravity, a process called accretion.

Overview

All data

116 statements · 16% with external sources · numbers in brackets are citations

Orbits: star system
Child astronomical body: artificial satellite
planetocentric orbit
Has characteristic: mass
orbital elements
age
radius
planetary magnetic field
volume
surface area
clearing the neighbourhood
Model item: Mercury applies to use with property: instance of
Earth applies to use with property: instance of
Mars applies to use with property: instance of
Jupiter applies to use with property: instance of
Saturn applies to use with property: instance of
Unicode character: 🪐
Studied by: planetary science
Different from: Planeta
Planet
Permanent duplicated item: Planet
Next lower rank: natural satellite
minor planet
Next higher rank: star

On other databases

76 identifiers linking planet across the web's reference databases

Data quality

116

statements

16%

externally sourced

Source last edited October 7, 2026. AIDB refreshes this page daily.

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Links

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Cite this page

AIDB. (2026). planet (Q634). Retrieved from https://aidb.si/e/planet-Q634