Space

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.After outer space from Earth :

   

Outer space is a bout 100km from Earth or more , lacks air that helps all organisms breath , and light is also not dispersed , and black  prevails over blue , due to the lack of oxygen in outer space that makes the sky blue .Outer space:

 It should be noted that the a rea of outer space cannot be precisely determined , due to the difficulty faced by the competent detectors ,where the long distances in space are measured by the light year, which means the distance travelled by light per year , estimated at about 9.3 trillion km. Space scientists using telescopes and conducting studies have been able to redraw galaxies since the universe began 13.7 billion years ago ,be fore the big bang phenomenon occurred in the universe ,and astronomers believe that space is innumerable, much larger than humans imagine.

Components of outer space : 

Outer space contains a lot of  gases , small dust plankton , as well as some particles and radiation , magnetic and electrical fields , the space is not as empty as many people think , as is contains a lot of  material , the space a round the stars is influenced by star wind components , magnetic fields , and the remaining elements of star death. the empty areas around the stars are described as cold and fragile , with number of molecules present varying from medium to center . in some areas every1cm 2 contains only one molecule, while others contain many molecules. Hydrogen and helium molecules are also wide spread in stellar circles , accounting for 98% of  molecules , and some other elements are available but with last density than hydrogen and helium as follows .

1.  Oxygen
2. Nitrogen
3. Calcium
4. Carbon
5. Some other metals

Why there's no gravity in outer space:

After many trips to space, it became clear why there was no gravity because it was relatively empty, there were no signs of movement, space movement was very slow, and some variations between Earth and space were present in relation to gravity.

Earth		Outer Space
The speed at which objects reach the earth's  surface when they are dumped.		Very slow to reach the surface of another planet and may last up to several years.
When you throw objects , they will collide with the earth's surface .	When you throw objects, they won't hit planets , they 'll just rotate around them.