There's no way to know. The event horizon hides everything from us. The matter in a black hole could be just barely smaller than the horizon and we'd never know. It could be emissive, but any glow just falls back in. We just don't know.
Madness string 105842
I'm using Skin's getCategoryLinks, which calls OutputPage's getCategoryLinks, from the BaseTemplate of a skin, which doesn't actually have anything to do with the Skin class. Now I need to use Title's getParentCategories to get the categories the rest of the time.