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About the Planets - Science@NASA
Our solar system has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. There are five officially recognized dwarf planets in our solar system: Ceres, Pluto, Haumea, Makemake, and Eris.

Planet - Wikipedia
The eight planets of the Solar System with size to scale (up to down, left to right): Saturn, Jupiter, Uranus, Neptune (outer planets), Earth, Venus, Mars, and Mercury (inner planets)

Planets in Order From the Sun | Pictures, Facts, and Sizes
The 8 planets in order from the Sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Explore pictures, sizes, distances, and facts.

Solar System - Wikipedia
The Solar System is the gravitationally bound system of the Sun and the masses that orbit it, most prominently its eight planets, of which Earth is one. The Solar System is an isolated single-star planetary system (not part of a larger star system) within the Milky Way Galaxy.

The Nine Planets of The Solar System | Eight Planets Without Pluto
An overview of the history, mythology and current scientific knowledge of the planets, moons and other objects in our solar system.

What is a Planet? - Science@NASA
The definition of a planet adopted by the IAU says a planet must do three things: It must orbit a star (in our cosmic neighborhood, the Sun). It must be big enough to have enough gravity to force it into a spherical shape.

What is a Planet? - National Geographic Kids
The planets in our solar system are shown from top to bottom: Mercury, Venus, Earth (and our moon), Mars, Jupiter, Saturn, Uranus, and Neptune.

Definition, Solar System, Characteristics, & Facts - Britannica
Planet, broadly, any relatively large natural body that revolves in an orbit around the Sun or around some other star and that is not radiating energy from internal nuclear fusion reactions. There are eight planets orbiting the Sun in the solar system.

Planets in Order From the Sun | Learn About The Solar System
Explore the Solar System and learn the planets in order, including their moons, photos, fun facts, and statistics.

Eyes on the Solar System - NASA/JPL
Explore the 3D world of the Solar System. Learn about past and future missions.