Ceres is a dwarf planet located in the asteroid belt between Mars and Jupiter. It is named after the Roman goddess of agriculture.
For a little Easter Egg, when Vargas is in the airlock, at 00:41:55. you can see a Portal Companion Cube float by out the window, lower right of the screen.
Special Effects. When the Canterbury is doing its flip and burn, an ice handler gantry breaks loose and smashes into the camera, "cracking" its lens.