Galaxies are multifaceted in that they often encompass many different kinds of outer space matter, such as star systems, dust particles, and gases.
Many scientists and astronomers have debated the existence of what is known as dark matter for years, and still have been able to reach a definitive conclusion as to whether it does actually exist or not. They do agree in believing that most space galaxies are gilled with massive black holes and other unknown rarities yet to be discovered. There are literally billions of different galaxies all floating around in space, and probably billions more that we do not know about, or do not have the technology to see yet. When you think about that, about how big galaxies are, and about how many there actually are in existence, can you imagine how big the whole of outer space must be? It blows your mind just to think about it.
When you talk to someone about galaxies, most of us often name the Milky Way, as it is the galaxy that we are the most familiar with. On clear nights, you can actually see the Milky Way galaxy when looking up at the night sky. We know that the Milky Way galaxy is extremely massive in size, and is made up of trillions and trillions of stars. One shocking fact about the Milky Way, to me anyway, is that when compared to the sun, it is literally huge. We consider the sun to be enormous, but if you were to place the sun and the Milky Way side by side for comparison, you would have to use a microscope to see the sun, if that helps you get a better mental image of just how massive the Milky Way is.
To help them keep better track of all of the galaxies existing in the universe, astronomers and scientists have classified them into three different groups. One of these three groups has been dubbed the spiral, given its name due to all of the galaxies in it being in a spiral shape. The stars surrounding the galaxies in the spiral group do not move around them in a certain path, as in many other galaxies, they instead gravitate in and out through the spirals.
Galaxies belonging to the field group are those galaxies that seem to float freely through space, alone in a huge world, not really touching or near other galaxies. There are not very many galaxies in this group, and perhaps it is the smallest of all three groups.
The last group is perhaps the largest of all three, the cluster group. Galaxies within the cluster group are all squeezed into the same teeny space, but travelling together, are massive in size. There are also galaxies that are referred to as super clusters, where there are many galaxies all in one, again packed tightly into the same space.
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Tags: Astronomers, Galaxies, Milky way galaxy, Stars
