- Most Distant Object in Solar System Discovered
 - Spitzer Space Telescope new release providing some intial information about Sedna, a planet-like body three times farther from Earth than Pluto. - Nine Planets: Sedna
- Presents some facts about the object officially known as 2003 VB12.
- Scientists Find Another Huge Mini-World in Outer Solar System
- SPACE.com article about the spherical object currently three times farther away than Pluto from the Sun.
- Sedna (2003 VB12)
- Profile of the red planetoid, the most distant solar system object ever discovered. From Michael E. Brown at the California Institute of Technology.
- Wikipedia: Sedna
- Trans-Neptunian object 2003 VB12, discovered by Mike Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (Yale University) on November 14, 2003, and announced on March 15, 2004.
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