- Dwarf Planets
 - See Mike Brown's selection of sites and links about Dwarf Planets in general and about some of the largest Dwarf Planets recently discovered at the Palomar Observatory. - Dwarf Planets Are Planets Too: Get Involved
- Alan Stern argues that scientists and the public would be much better off if we adopted a comprehensive planetary definition that is a self-consistent and allows astronomers to reliably and consistently sort objects into "planetary" and other categories. Sky and Telescope welcomes their readers to post a comment expressing their own opinions.
- Final IAU Resolution on the Definition of "Planet"
(PDF) - Read the IAU resolutions that define what a "planet" is in our solar system and that create a new class of objects called plutonian objects.
- Find the "Dwarf Planets"
- SkyTonight.com guide to finding Pluto, Ceres, and Eris in the night sky.
- Fourth Dwarf Planet Named Makemake
- The International Astronomical Union (IAU) has given the name Makemake to the newest member of the family of Dwarf Planets -- the object formerly known as 2005 FY9 -- after the Polynesian creator of humanity and the god of fertility.
- Goodbye, Pluto. Hello, "Dwarf Planets"!
- Sky & Telescope article about the 26th General Assembly of the International Astronomical Union's resolution that defines a planet in our solar system in such a way that only Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune qualify.
- Mike Brown's Planets
- Weekly column from astronomer Mike Brown on space and science, planets (full and dwarf), the sun and the moon and the stars, and the joys and frustrations of search, discovery, and life.
- The Great Planet Debate: Science as Process
- Scientific conference and educator workshop that will explore the basic, but controversial, question: What is a planet? Johns Hopkins University, Maryland; August 14-16, 2008.
- What's In a Name?
- Mike Brown discusses the official naming of the Kuiper belt object/dwarf planet/Plutoid formerly known mostly as 2005 FY9 to Makemake.
- Wikipedia: Dwarf Planet
- Article about dwarf planets, a category of celestial bodies defined in a resolution passed by the International Astronomical Union (IAU) on August 24, 2006.
- Wikipedia: Plutonian Object
- Article about a plutonian objects, objects belonging to "a new category of trans-Neptunian objects", with the dwarf planet Pluto being the prototype for the category.
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