What do you think?

Looking at these images, can you understand how astronomers could have misunderstood the nature of galaxies by what they saw in the night sky?

Image of Spiral galaxy, which looks like arms spinning around the center, NGC 6332.
Public Domain | Image courtesy of NASA.
Image of Round-shaped, soccer-ball like elliptical galaxy.
Public Domain | Image courtesy of NASA.
Image of Irregular shaped galaxy, NGC 1427A.
Public Domain | Image courtesy of NASA.