I guess... From https://en.wikipedia.org/wiki/Star_catalogue https://en.wikipedia.org/wiki/Star_catalogue : > The largest [catalogue] is being compiled from th

I guess... From https://en.wikipedia.org/wiki/Star_catalogue https://en.wikipedia.org/wiki/Star_catalogue : > The largest [catalogue] is being compiled from the spacecraft Gaia and thus far has over a billion stars. I think you'd have to go out of your way to "know" a large number of stars without having some equivalent of a label to keep track of them.