They are called 'irregular galaxies"
The difference is in the shape, as can be guessed by the name.
The Milky Way is both disk-like and spiral in shape. It is a barred spiral galaxy, meaning it has a flat, rotating disk with spiral arms emanating from a central bar. This shape is common among spiral galaxies due to the rotation of stars and gas in the galaxy.
A galaxy that has no discernable shape or structure is typically referred to as irregular. Irregular galaxies do not have a distinct spiral or elliptical shape, and can exhibit a chaotic, disorganized appearance. These galaxies often contain young stars and a mix of gas and dust.
An irregular galaxy is a galaxy with no definite shape like spirals, lenticulars, and ellipticals.
The Andromeda Galaxy is a spiral galaxy, just like our own galaxy (the Milky Way).The Andromeda Galaxy is a spiral galaxy, just like our own galaxy (the Milky Way).The Andromeda Galaxy is a spiral galaxy, just like our own galaxy (the Milky Way).The Andromeda Galaxy is a spiral galaxy, just like our own galaxy (the Milky Way).
irregular galaxy
It depends what shape the galaxy has.
Irregular galaxy
The "pinwheel" shape is usually called "spiral".
pentagon
Not surprisingly, it would be called an irregular galaxy.
It is known as an irregular galaxy. A few different Classifications are : Irr L (some structure) Irr LL (No visible structure) Also Dward Irregulars : DL DLRRS (Low Metallicity)
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.
A square.
hexagon
The shape is called a decagon. If all the sides and angles are the same, it is called a regular decagon.
A regular 5-sided shape is called a pentagon.