size and shape
Galaxies are classified according to their shape and structure, such as spiral, elliptical, and irregular. Additionally, galaxies can also be classified based on their size, luminosity, and proximity to Earth.
Superstitions can be categorized according to the subject matter. They can be categorized according to the culture from which they originated. They can also be categorized according to time period.
Shape, or morph. The spiral galaxies, elliptical galaxies, lenticular, barred spiral, and irregular galaxies all are different shapes or morphs of galaxies, and so they are classified differently.
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).
Astromoners and Astrologists.
Galaxies are primarily classified according to their shape. Such as spiral, elliptical, and globular.
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There are three main types of galaxies: Elliptical, Spiral, and Irregular. Two of these three types are further divided and classified into a system that is now known the tuning fork diagram. When Hubble first created this diagram, he believed that this was an evolutionary sequence as well as a classification.
They are categorized according to:Physical form (solid, liquid, or gaseous)radioactivity level (high, intermediate, low)
Edwin Hubble
Galaxies can be broadly categorized into three main types: spiral, elliptical, and irregular. Spiral galaxies, like the Milky Way, feature a flat, rotating disk with arms that radiate outward, containing stars, gas, and dust. Elliptical galaxies are more rounded and lack the distinct structure of spiral arms, often containing older stars and minimal gas. Irregular galaxies have an undefined shape and are typically chaotic in appearance, often rich in gas and young stars, resulting from gravitational interactions or collisions with other galaxies.
Hubble devised subcategorization for spiral galaxies first based on whether the galaxy exhibited a bar and then how well the spiral arms were defined. The classes are designated as Sa, Sb, and SC with the Sa class being the most tightly wound. A capital B designation after the S indicates the presence of a bar as well.