Comets of the Solar system

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

Plutonic love

One hundred years ago the world was captivated by the idea of the existence of a ninth planet in the composition of the solar system. But today, in the year 75-year-old.

…Pluto, astronomers around the world have for that “little” romantic feelings…

Planet X

The existence of a ninth planet in 1905, predicted the American Percival Lowell, famous for his search for a civilization on Mars. According to the calculations of Lowell, beyond the orbit of Neptune is another large celestial body, having a direct connection with the solar system.

Lowell noticed deviations in the motions of Uranus and Neptune from calculated orbits and decided that this is due to the influence of more distant planets. The object of his hypothesis, Lowell called planet X, but its “real” opening it, alas, did not survive. Continue reading

Short and long-period comets

The diversity of comets in the Solar system

The comet (from al-Greek. hairy, shaggy) – a small celestial body having a foggy view, orbiting the Sun in conic section with a very extended orbit. When approaching the Sun, the comet forms a coma and sometimes a tail of gas and dust.

Comets are placed into circulation periods:

1. Short-period

At this time, found more than 400 short-period comets. Of these, about 200 were observed in more than one perihelion passage. Short-period comets (period less than 200 years) come from the region of the outer planets, moving in the forward direction for orbits lying close to the Ecliptic. Away from the Sun, comets usually do not have “tails”, but sometimes have a barely visible “to”, surrounding the core; together they are called the “head” of the comet. Approaching the Sun the head is increased and there is a tail. Many of them belong to so called family. For example, most of the short-period comets (full rotation around the Sun lasts 3-10 years) form the family of Jupiter. A little smaller of a family of Saturn, Uranus and Neptune (the latter, in particular, is the famous comet Halley). Continue reading

Comets threaten to arrange in the Solar system chaos
If the Sun will increase its luminosity by a few percent, the ice will begin to evaporate and jets of gas will give the comets the reactive acceleration. "Graveyard of…

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Long-term manned space missions is now impossible
The answer to the question of how in the coming years will be Russia's contribution into the process of full exploration by the inhabitants of the Earth, not yet clear…

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Space: Science and technology
"It's huge" 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…

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