# Are galaxies “disk” shaped?

When you look a sphere from a fixed observation point, you can easily mistake it for a circle, so I was wondering: are galaxies really "disk" shaped or we just don't have the means to detect the "$z$-axis" of them?

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–  Qmechanic Jun 27 at 13:44
We often see them edge-on, so we have a pretty good idea of what general galaxies' z-axes look like. –  Charles Jun 27 at 13:44