It depends what shape the galaxy has.
They are called 'irregular galaxies"
The "pinwheel" shape is usually called "spiral".
Not surprisingly, it would be called an irregular galaxy.
The same stellar materials and dust any other galaxy is made of - it just hasn't taken on a coherent shape - yet, or possibly it had a collision encounter with another galaxy, leaving it "irregular" - either is possible.
The shape of the Milky Way (our galaxy) is the shape of a spiral.
irregular galaxy
First of all, it's a spiral galaxy, not an spiral galaxy. Second, a spiral galaxy would have a spiral shape, obviously.
An Irregular Galaxy is a galaxy that has no shape or form as defined by the classes of the "Hubble sequence" An Amorphous galaxy is a galaxy that has neither spiral nor elliptical in shape as defined by "The Atlas of Peculiar Galaxies". See related links for pictorial representation
An irregular galaxy is a galaxy that doesn't have a specific shape like a pinwheel or an elliptical galaxy.
A spiral galaxy has the shape of a pinwheel. Our solar system is in a spiral galaxy that we call the Milky Way.
Our galaxy is a spiral galaxy because it is spiral in shape.
Elliptical Galaxy!