Universe

Universe


The universe is what exists in the dome of the sky, of which celestial bodies are dark like planets, the earth on which we live one of these planets, and of the celestial bodies what is illuminating and moving like stars, as our sun, which provides us with light and heat, is one of them, and the scientific concept of the universe is that it is the vast space that contains stars, galaxies, planets, meteorites and comets, as they all belong to the so-called galaxies and there are a large number of them and these galaxies are different forms, some of which are It's oval, and some of it's my penis, and the most famous of these galaxies is the Trail Galaxy the milky planet to which our planet belongs.

The sky we see is not a physical medium, but it is gases in constant proportions spreading in space and what blue we see is only the only color of the spectrum that remains resulting from the degradation of sunlight, and all the celestial bodies in space are members of our planet to which we belong, which is known as the Galaxy, and if we observe a particular star at a certain time we notice its change in location due to the rotation of the Earth around itself, resulting in night and day. Another earth cycle around the sun results in a succession of four seasons, summer, winter, autumn and spring.

There are many opinions, many sayings and different theories about the emergence of the universe and that it is eternal or non-eternal. Theories have shown that the universe is not eternal because it has not reached a state of balance, and the balance state according to physical laws means that the universe is a single mass that shares characteristics and characteristics. The material travels from the high density area to the less dense area, and the heat travels from the body with a higher temperature to the lower-temperature body. This proves that the universe is not eternal.

There are two converging names of the universe: the universe and cosmic space, few of us do not realize the difference between the word universe and the word cosmic space, the name of the universe means or expresses the visible universe to us, that is, what we can see, and cosmic space is a name that includes everything that God has created, whether we can see it or not. The term universe is a derivative term that derives the origin of this Greek word and means order, so the universe is called a universe because of its regularity, and the word cosmic space has existed since time immemorial.

Cosmic distances can be measured by what astronomers call the light year and using the light year we measure the distance between planets and galaxies.


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Astronauts

صورة
    Astronauts  are someone trained by a manned space flight program to pass, drive or serve as a crew member of the spacecraft. While the name is often called professional astronauts, it is sometimes called scientists, politicians, journalists and tourists. Until 2002, the sponsorship and training of astronauts was limited to governments only, either by the military or by civilian space agencies. After the privately funded subtropical flight of the first space ship Ship One in 2004, a new category of astronauts emerged.
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Space

صورة
What is Space:  Space is defined as the space between celestial bodies , called outer space to distinguish it from the air space a round the glob ,and space can also be defined from a physical perspective as a three- dimensional,  unlimited space in which objects take relative position and directions.
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Elements of the solar system

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  Elements of the solar system: The solar system consists of: the star of the sun, in addition to all the celestial bodies orbiting it by the force of gravity, these bodies include: planets, dwarf planets, moons, asteroids, comets and meteorites, all the objects of the solar system are located in the Milky Way galaxy, and the following is an explanation of these clusters.
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