Solar system. Planets of the solar system
Its center is a huge star called the Sun. It is the closest star that is billions of years gives us light and heat. Without it, impossible would be life on the planet. Around it revolve the planets, of which eight are known today, as well as other celestial objects.
Schematically, the structure of the solar system is as follows:
Man is always interested in the question thus arose our solar system. But it was a long time before scientists were able to answer this question. There were many versions and assumptions on this issue. And today, astronomers are continuing their investigation.
According to a hypothesis of Kant-Laplace five billion years ago there was only a gas cloud. It moved through the universe, but at some point he undergoes certain processes. Then there is compression and then begins the rotation, the center of rotation is the fastest. The temperature at the center of the cloud began to grow and formed a protostar that later became the Sun. The nebula continued to spin, and the star are unable to absorb all the substance of the nebula, they are attracted, experienced, forming planetesimal. One of them appeared on the planet. Continue reading
In the fall of 2020, after Amateur astronomers Vitaly Nevsky and Artem Novichonok first observed the comet ISON, astronomers had expected that she would become a “Great comet” − a rare visitor, perhaps the brightest comet of the twenty-first century.
Alas, severely battered during the close approach to the Sun in November of this year, ISON no longer promises such a bright future. To the naked eye from the Ground to see it would be impossible − but hopes not worth it to lose. Somewhere in the dark depths of space, probably unnoticed by anyone else is racing the comet, which will deserve the attention and present us with an unforgettable sight. This has always been the Large comets appear about once a decade, and every century one of them was especially bright.
We will tell you about these “comets of the century”, since the sixteenth century. It is interesting that they flew as a rule, in the second half of your century, and has had an average of once every 97 years. Given this, we can calculate that if the comet of Ikeya-Seki (C/1965 S1) visited the Earth in 1965, following a visitor, you can wait until 2029.
However, to predict what particular impossible: a Big comet can appear quite unexpectedly, at almost any time. The message we may hear tomorrow.
Recently the world celebrated the first 50 years of human space flight. And now, after half a century, this date should be remembered, because in space, traveled more than five hundred people from many countries, including from Ukraine.
Fidel Pavlenko said Oleg Fedorov, Director of the space research Institute of NAS of Ukraine, whether to continue to consider, on 12 April an outstanding day in the history of mankind?
Space activity is not profitable. It is of course. But we understand that there is a space of 40 Nations with a space program, and even in the crisis public investment has not decreased, as far as I know. This suggests that many countries consider that such activity for us today it’s not profitable, but, as the Americans say – investing in the future.
It seems to me that every civilized man, who forgets the beginning of its activities or the activities of its predecessors, not like this. So one who is engaged in space activities, even for him this is not only a celebration, an occasion to reflect every time on what you do today, what path was and what is waiting for you. Therefore very important for us because this date is once again to think over the strategy. Continue reading