No, galaxies are three dimensional. Do you mean are there galaxies without a bulge in the center? That answer is yes. Some are shaped like balls, some have irregular shapes, and the rest (which is really most of them) are shaped like discs. Almost all disc-shaped galaxies have a bulge in them, but there are a few that do not have any bulge at all- they are flat discs. Just like a CD.
They are shaped like a round galaxy and they are flat
Both the Milky Way and the Andromeda galaxies are flat spirals in shape.
spiral arm
We don't for sure as our vantage point does not allow us to determine that. However, by viewing other spiral galaxies (Andromeda, Sombrero galaxies) we can make a calculated guess that our galaxy is shaped in the same way.Also, while we can't see the galaxy as a whole, what we can see is consistent with it being a flat disk... specifically, we can even tell that it appears to be a barred spiral galaxy.
A bulge is a tight group of stars found at the center of most spiral galaxies. The bright spot an the center of the galaxy in the picture above is the bulge. If this galaxy were seen from the side the collection of stars would create a bulge (spheroid) expanding out from the otherwise rather flat galaxy.
The Milky Way galaxy is a flat spiral - one of the commonest galactic forms in the universe.
When seen edge-on, a spiral galaxy appears as a thin, flat disk with a bulging central region. The disk is often darkened by dust lanes along its plane, giving it a more defined edge. The spiral arms are not visible from this perspective.
The galaxy is flat because of the way it formed and rotates. As the galaxy spins, gravity pulls the stars and gas towards the center, creating a flat, disk-like shape. This rotation helps maintain the flatness of the galaxy over time.
Both the Milky Way and the Andromeda galaxies are flat spirals in shape.
The axis plane of the solar system is tilted by about 60 degrees relative to the average plane of the Milky Way galaxy. This means that the solar system is not perfectly aligned with the flat disk of the galaxy but is slightly inclined.
No one knows that because we have not explored outside the universe. If you are thinking about the galaxy, it looks like a straight line from Earth and a circular object from outside the galaxy.
Galaxies are flat because of the way gravity and angular momentum interact during their formation. As gas and dust collapse to form a galaxy, the rotation causes it to flatten out into a disk shape. This rotation helps balance the inward pull of gravity, resulting in a flat, disk-like structure.