<<The great attractor is probably a very massive galaxy cluster located where we can't see it behind Milky Way dust clouds. >>

Where I was coming from was, if there's some unexplained huge mass in intergalactic space that we can't see, and if that is being explained by baryonic matter, how do we know in the depths of the universe there aren't super-great attractors, or indeed large numbers of difficult-to-detect minor great attractors?

However, you seem to be saying it's just a line of sight problem, if we could see past our own milky way dust clouds, we'd be able to see it.

Has anyone checked through distant galactic vectors to check for other great attractors?