Comets: the oldest inhabitants of the Solar system
J. L. Lagrange (1813) was also based on firmly established facts – the presence of comets that definitely move in elliptical orbits, including short-period. He explained the origin of comets gigantic volcanic explosions – emissions (eruption) with giant planets. It is, in principle, could explain the nature of the orbits of short-period comets. Subsequently, the views of La Grange shared and developed a number of scientists, among which the most important contribution of the Soviet astronomer S. K. Bo, who worked in this direction with the 20-ies to 80-ies of our century. He has eliminated the biggest internal difficulty is the concept of Lagrange – the necessity of the ejection of cometary masses (nuclei) with the “surface” of the giant planets with their powerful gravity fields, the overcoming of which requires an initial speed of 60 km/s and more. Giant planets also have thick (the length of many thousands of miles) and very dense atmosphere, in the middle of the twentieth century has been very problematic the very existence of a solid surface planets – giants beneath these atmospheres. Continue reading
China completed test heavy carrier rocket “Changzheng-5” (“long March 5”), which will be the basis for its lunar missions. Federal news Agency – at what level is the celestial space.
About the end of the test “Changzheng-5” according to the Chinese media. The development of these rockets was originally planned to be completed in 2008, but funding was only allocated in 2007. In the end, the first tests began in September of last year, and the first test flight is scheduled for September. In 2017 it is planned with the help of this rocket launch to the Earth return vehicle “Chang’e-5” to collect the local soil.
“Changzheng-5” refers to the basic Chinese family of rockets, named in honor of the legendary long March of the Communists in the Civil war in China. “Changzheng-1” was created on the basis of a ballistic missile with a nuclear warhead “Dongfeng-4”, launched in 1970 the first Chinese satellite. In fact, from this time begins the history of taikonautti – space Chinese.
However, prior to the 1990-2000-ies the development of the Chinese space was neither good, nor bad. And only in the last 10-20 years there was a serious success. But the speed of development was downright cosmic. Continue reading
About the discovery of the ninth planet of the Solar system two astronomers from the California Institute of technology in Pasadena became known on January 20. One of them — the native of Russia Konstantin Batygin — spoke about the search for Planet X, the difficulties with the title the new heavenly bodies and unsolved mysteries of the Solar system.
What is an open planet?
Konstantin Batygin . She falls into the category of dwarf planets. This celestial body is quite massive. Our model gives a mass of about ten earth, this planet is just a giant. Now it is defined as a celestial object whose gravitational field is dominant in that part of the Solar system.
In General, there is not even a question: it’s a planet or not. We know about it, because its gravity affects the orbit of the farthest objects in the Kuiper belt. The very mathematical modeling relies on the fact that this planet has enough mass for gravity to dominate in the Solar system. Continue reading