About universe and more.

Moon - Earth's only natural satellite. One of the largest natural satellites in solar system. It is a celestial body like stars and planets in scientific works, the moon is referred to as ( lat; Luna) It's symbol is the crescent. The average Lunar distance from Earth is 384.403 km , its diameter is 3.476 km. The moon rotates with the Earth around it. it can be seen mainly at night, but sometimes its possible also daytime. It comes  in many shapes and sizes from Earth. why is this so? and why is it shining at night if it is the coldest and darkest celestial body?  the  moon really can't shine. It shines  with sun's reflective rays.  the moon revolves around the earth that we only  see one side of it,  However scientists ere able to see the other side with help of the spacecrafts. Sometimes we see the sun round, arc, or semi-circular this because we see its side which side the sun shines on.   in fact the shape of the moon doesn't change completely . it takes 2

Gravity in Latin ( gravitas) it is the interaction between all material bodies. The secret of gravity Even the sciences were not fully studied.  It is gravity that keeps the planets in the limelight. It is described by Newton's  theory of gravity and more precisely by Einstein's general theory of relativity. the force of gravitational attraction between two  material points with masses m 1 and m 2 at a distance r is proportional to both masses and is inversely proportional to the square of the distance between them.   F = G m 1 m 2 /r 2       and where G is the gravitational constant. about    6,67×10 −11  მ³/(კგ·с²) .              The force of  the sun's gravitational has pull 9 planets dozens of their satellites thousands of asteroids  and comets. without the force of gravity, planets, satellites and comets would fly in their own way. as we all know one of the grand events of nature - the seas and the oceans -is also subject to the force of g

On a clear night the stars  are shining on the sky. Previously used the term " arch of the sky " for millennia there has been a conception for the arch of the sky and that our century ends at its extremity., which of course is simply an illusion, vision error, but astronomers keep the arch commandment of the sky , as it can be more convenient to determine celestial bodies and their location.  when we look at the sky with then naked eye, we see projections of stars and celestial bodies, that is dots of light passing through the light, as we see from naked eye ,it seems that they are very close to each other in fact you are tremendously distant from each other. Exceptions to this are physically double stars , multiple stars, scattered or spherical clusters, star associations and.... e.t.c.  The individual odd stars in these cloisters are not only seemingly close to each other,  with astronomical scales  their distance from one another really is not big. it seems to us tha

Sun The sun is most important to life, without it there would not be life. 5 billion years ago, there was no sun or the planets around it. how did the sun arise? It emerged from the fragments of stars explosions, along with the sun the solar system was created and of third to these planets life has appeared. the sun has been around five million years. the average distance to sun is 149,6 million kilometers. The sun is center of our planetary orbit. it is the star that has been shining quite uniformly for millions of years, if its surface temperature had changed by 10 percent , the earth would have died down. the sun is made up of various gasses , the giant ocean deliver energy to the celestial bodies round it. In the seventeen century, a renowned Italian scientist Galileo   created a telescope, through which he saw spots moving on the surface of the sun. the sun is composed of several layers . there is a nucleus in the middle where there is a very high temperature. the nu

What is a black hole? The term "black hole,, was first used by "John  Wheeler,,   in 1967 ,the word itself is very suggestive and interesting. it was unthinkable and unbelievable in the 20th century but just a few years ago, it officially came to pass. his discovery and research have been greatly influenced by " Stephen   Hawking, , who was even called a black hole hunter.             A black hole is a place in the cosmos  where gravity is so strong that  nothing can escape from it also light. strong gravitation arose because the material is placed in small space, such compression occurs at the end of the star. some came just after the death of the stars, black holes are invisible because they absorb light.  however they can be viewed through special tools. the black holes are in different size. the mass and size of the black hole determine what it looks like.NASA studies black holes with spaceships as the  Chandra  X-ray observatory, the satellite "swif