From ScienceDaily: Ultra-Compact Dwarf Galaxies: Stars Packed Together In Early Universe A Million Times More Closely
ScienceDaily always has very literal titles, doesn't it? Kind of ruins the little bit of surprise for my post. Perhaps they should use more metaphors and figurative, oblique language. Or perhaps I should just stop quoting the titles beforehand.
Anyway! Ultra-compact dwarf galaxies! Sweet! These were very early galaxies, and very small and dense: mostly around 60 light years across, but a million times more crowded than what we're used to, so there was around a million stars in a cubic light year instead of just one.