Galaxies are multifaceted in that they often encompass many different
kinds of outer space matter, such as star systems, dust particles, and
gases. Each individual galaxy is filled with millions and trillions of
bright, beautiful stars, and on each galaxy, these stars have their own
distinct path, or orbit, to follow. When speaking of how large or small
galaxies are, they are measured in light years, rather than acres or
miles, and the average galaxy is often millions of light years across,
most even larger.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 balk 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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