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What are the galaxy categories?
Astronomers classify galaxies into three major categories: elliptical, spiral and irregular. These galaxies span a wide range of sizes, from dwarf galaxies containing as few as 100 million stars to giant galaxies with more than a trillion stars.
What are the 4 types of galaxies and their definitions?
There are four main categories of galaxies: elliptical, spiral, barred spiral, and irregular. These types of galaxies are further divided into subcategories while at the same time other types of galaxies exist based on their size and other unique features. Around 77% of the galaxies observed by man are spiral galaxies.
What are the 5 types of galaxies?
You may already be familiar with the galaxies: spiral, barred spiral, elliptical and irregular. These fascinating galaxies were each formed from a unique mixture of gases and matter that came together, painting our magnificent galaxies, each one a unique work of artistic beauty.
How many types of galaxies are in the universe?
four
There are four distinct types of galaxies in the universe, elliptical, spiral, barred spiral, and irregular. Although these are the four main types, there are various types of galaxies and the way in which they are classified is by their shape.
Why do we classify galaxies?
For example, there are barred spirals like the Milky Way, and non barred spiral galaxies. Similarly, the compactness an elliptical galaxy is important to its classification. The size of the galaxy can determine what type it is as well, such as small elliptical galaxies are called dwarf galaxies.
What are groups of galaxies called?
Clusters of galaxies, and clusters of clusters of galaxies, called superclusters, make up the structures in the geography of the universe. In this section, we’ll explore these structures and take a look at our address on these scales. Galaxies are titanic swarms of tens of millions to trillions of stars.
What is the structure of our galaxy?
This structure can be viewed as consisting of six separate parts: (1) a nucleus, (2) a central bulge, (3) a disk (both a thin and a thick disk), (4) spiral arms, (5) a spherical component, and (6) a massive halo. Some of these components blend into each other. Three views of the Milky Way Galaxy.