We have already mentioned that the Earth is within the solar
system and the solar system is present in the Milky Way galaxy.
But what is the galaxy? And What is the Milky Way
galaxy?
The galaxy is a huge gathering containing billions of stars, planets,
asteroids, meteorites and numbers, and also contains the remains of stars and
dark matter and global dust, and is taken from the root of the language
"Hungary" means: much.
The galaxy is probably full of huge amounts of stars, dwarf galaxies
have about a few thousand stars, and about that giant is a hundred trillion
stars, all of which take the center of gravity orbited it !!
Most of the cosmic galaxies are dwarf galaxies, which are very small
compared to conventional galaxies, which are less than 1% of the Milky Way, and
contain a few billion stars compared to galaxies The dwarf galaxies are said to circulate
around larger galaxies. The Milky Way, for example, has about a dozen of its
galaxies, and we can not separate dwarf galaxies from elliptical or helical
galaxies because they may be just like them, but in miniature.
In human
assimilation, the galaxy is one of billions of galaxies !! At the time of great
discoveries of astronomy and galaxies, As
confirmed by scientists that the galaxies of the universe arose earlier than
scientists assumed until this time,
And that the
stars of the galaxy were recently discovered to about 0.2 billion years after
the Big Bang, so the observations of the formation and distribution of galaxies
show their approval with the theory of great achievement, and take from that
period larger clusters such as huge Hungarian clusters and imagined that
distant galaxies are very different from The nearby galaxies, as well as the
galaxies that have formed in the near future, are completely different from
those that were formed ago soon of the Great Bang.
The
philosophers differed in their views on the composition of the galaxy.
Democrites said that the wide belt in the night sky was only stars at long
distances. Aristotle described the Milky Way or light in the form of a bar at
night causing the exhalation caused by stars in many numbers and close to each
other Some say that this ignition is active in the upper layers of the casing.
The modern Platonist or the little Mebrus criticizes Aristotle's view and casts
forth his destination and sees that the Milky Way is celestial. There were
valuable attempts away from philosophy through the world Ibn al-Haytham, whose
scientific experiments were effective and concrete. He said that the Milky Way
galaxy is very far from the Earth, not in its atmosphere to be followed by the
Peronite and many scientists who still today And more near realism.
Milky Way can
be defined as a human galaxy. It is spiral in shape and contains hundreds of
millions of stars, including the sun. This galaxy can be seen on dark nights to
appear as a thick star in the sky. The Milky Way is unstable and constantly
circulates because its arms move through space, in addition to the movement of
the sun and the solar system, where the solar system moves within the galaxy at
an average speed of 828,000 kilometers per hour, and despite this speed rise it
may take about 230 million light years to move along Milky Way.
The size of the
Milky Way galaxy The first accurate measurement of the size of the Milky Way
Galaxy was conducted by the American astronomer Harlow Shapley in 1917. The
size of the Milky Way galaxy was determined by creating a spatial distribution
of spherical clusters. , The sun is located 30,000 light years away from the
center, and the stars are far from the center of the galaxy and about 100,000
light-years away.
Facts about the
Milky Way galaxy:
The Milky
Way galaxy can be identified with the following facts: The structure of the
Milky Way galaxy is a model of a large helical system. Its structure consists
of six separate parts: the nucleus, central bulge, disc, helical arms,
spherical and massive halos, These ingredients are with each other. The center
of the galaxy consists of the black hole, which is generated by the energy out
of the big stars. The galaxy consists of a large system of stars, gases,
especially hydrogen, dust, and dark matter, orbiting a common center and linked
by gravity. The
galaxy is one of billions of galaxies in the universe.
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