The sun – the central body of the solar system – is a hot plasma ball. The sun is the star closest to Earth. The light from it reaches us in 8.3 minutes. The sun has decisively influenced the formation of all the bodies of the solar system and created the conditions that led to the emergence and development of life on Earth. Its mass is 333,000 times the mass of the Earth and 750 times the mass of all other planets combined. Over the 5 billion years of the sun’s existence, already about half of the hydrogen in its central part has turned into helium. As a result of this process, the amount of energy that the sun radiates into world space is released. The radiation power of the Sun is very large: about 3.8 * 10 20 degrees MW. An insignificant part of solar energy, about half a billionth of a billion, falls on Earth. It maintains the earth’s Continue reading
The Sun enters the Solar System, 9 large planets together with their 34 satellites, more than 100 thousand small planets (asteroids), about 10 to the 11th degree of comets, and also countless small, so-called meteor bodies (from 100 meters across to negligible dust particles ) The central position in the solar system is occupied by the sun. Its mass is approximately 750 times greater than the mass of all other bodies included in the system. The gravitational attraction of the sun is the main force that determines the movement of all the bodies of the solar system that revolve around it. The average distance from the Sun to the planet farthest from it is Pluto 39.5 AU, i.e. 6 billion kilometers, which is very small compared with the distances to the nearest stars. Only some comets are 100 thousand AU away from the Sun. and are exposed to the attraction of stars. Moving in the galaxy, the solar system from time to time flies through interstellar dust clouds. Due to the extreme discharged matter of these clouds, the immersion of the solar system in the cloud can occur only with a small absorption and scattering of sunlight. Continue reading
In each era, people in their dreams solved the problem of contacts with aliens, based on the technology of their time. Until the 18th century, people believed that the energy of muscles, their own and domestic animals would be enough to fly to the stars. And therefore, even fantasizing, the only thing they could offer was just a crew harnessed … to a flock of birds. Our distant ancestors did not know that the air would end immediately, when you “fly away from home”. They did not even imagine the enormous distances separating us from the moon and planets, not to mention the distances to the stars. Then, having measured these distances and having learned that almost empty, airless space divides celestial bodies, they began to dream at least of mutual signaling.
In the XIX century, just a hundred years ago, everyone seriously believed in the existence of Martians. And then, quite seriously, scientists put forward assumptions about the optical connection with them. The mathematician Karl Gauss proposed cutting a triangle in the Siberian forests a multimeter in the form of a triangle and planting it with Continue reading