Largest Asteroid May Be Mini Planet
- HubbleSite press release describes possible water ice and differentiation of material which may affect classification.
- http://hubblesite.org/newscenter/newsdesk/archive/releases/2005/27/text/

Astronomy Picture of the Day
- Hubble Space Telescope picture of Ceres, with links to other resources.
- http://apod.nasa.gov/apod/ap060821.html

1 Ceres - Wikipedia
- Article describes discovery, history and status, and physical and orbital characteristics.
- http://en.wikipedia.org/wiki/1_Ceres