Dwarf planet - Wikipedia
A dwarf planet is a small planetary-mass object that is in direct orbit around the Sun, massive enough to be gravitationally rounded, but insufficient to achieve orbital dominance like the eight classical planets of the Solar System.
Pluto & Dwarf Planets - Science@NASA
Our solar system has five dwarf planets: In order of distance from the Sun they are: Ceres, Pluto, Haumea, Makemake, and Eris.
Dwarf planet | Definition, Characteristics, & Facts | Britannica
Dwarf planet, body, other than a natural satellite (moon), that orbits the Sun and that is, for practical purposes, smaller than the planet Mercury yet large enough for its own gravity to have rounded its shape substantially.
Dwarf Planets: The Complete List - 33Science
An object is classed as a dwarf planet when it orbits the Sun, is not a satellite, has enough mass for its self-gravity to make it nearly round, but has not cleared its orbital neighborhood; size, observed shape, and orbital context are the main factors used by astronomers.
Dwarf Planets in Our Solar System | Canadian Space Agency
Because they are smaller, dwarf planets lack the gravitational forces needed to pull in and accumulate all of the material found in their orbits. Each known dwarf planet in our solar system is actually smaller than Earth's Moon!
Types Of Dwarf Planets - Little Astronomy
Explore the Types of Dwarf Planets in our illustrated list of 14 dwarf worlds — from Pluto and Eris to Ceres and beyond. This post breaks down each entry by…
What are dwarf planets, and how many are there? | Live Science
In 2006, Pluto was famously demoted from a planet to a dwarf planet. It remains the most famous dwarf planet today, but there are others in our solar system, including potentially...
Dwarf Planets: List, Facts, and Differences from Regular Planets
Discover dwarf planets in our solar system including Pluto, Eris, Ceres, Haumea, and Makemake. Learn their characteristics, differences from planets, and interesting facts.