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
A galaxy that does not have a regular shape is classified as an irregular galaxy. Unlike spiral or elliptical galaxies, irregular galaxies lack a defined structure and often have a chaotic appearance. They can contain a mix of young and old stars, gas, and dust, and are typically found in regions with gravitational interactions or near other galaxies.
A regular galaxy refers to a type of galaxy that exhibits a distinct, well-defined shape and structure, typically categorized as elliptical or spiral. These galaxies have a uniform distribution of stars and gas, with a clear central bulge and disk in spiral galaxies, or a smooth, featureless appearance in elliptical galaxies. Regular galaxies contrast with irregular galaxies, which lack a coherent shape and often have chaotic structures. Examples of regular galaxies include the Milky Way (a spiral galaxy) and M87 (an elliptical galaxy).
The "pinwheel" shape is usually called "spiral".
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)
Not surprisingly, it would be called an irregular galaxy.
pentagon
A galaxy that does not have a regular shape is classified as an irregular galaxy. Unlike spiral or elliptical galaxies, irregular galaxies lack a defined structure and often appear chaotic in form. They are typically rich in gas and dust, which can lead to active star formation. Examples of irregular galaxies include the Large and Small Magellanic Clouds.
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 regular 2D shape is called a "regular polygon." Regular polygons have all sides of equal length and all interior angles of equal measure. Examples include an equilateral triangle, square, and regular pentagon. These shapes exhibit symmetry and uniformity in their structure.