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


SPACECRAFT ( SC ) is a technical device used to perform a variety of tasks in space. as well as conducting research and other works on the surface of various celestial bodies. Means of delivery of spacecraft into orbit serve as launch vehicles or aircraft .

Spacecraft, one of the main objectives of which is to transport people or equipment in the upper part of the earth’s atmosphere — the so-called near space. also called “Space aircraft” ( CLA ).

The use of spacecraft to determine their separation in the following groups:

suborbital SPACECRAFT ;

earth orbital SPACECRAFT . moving on geocentric orbits of artificial satellites ;

interplanetary (expeditionary) SC ;

napolnenie KA . Continue reading


Giant spaceships approach the Earth?

The recent statement by scientists from SETI (the project engaged in the search for extraterrestrial intelligence) is not a joke stirred the public. Once the U.S. government decided to stop funding SETI, the researchers of this organization released information that they were able to detect several huge objects of unknown origin near the orbit of Pluto is rapidly approaching our planet. Assume that these objects are concentrated in the field of length 150 and a width of 30-50 miles. Also refer to the coordinates with the location detected UFO:

19 25 12, -89 46 03

16 19 35, -88 43 10

Scientists are unhappy that the government is trying to hide such important information from people.

There are rumors that these ships are here to save humanity from the terrible disasters that can occur on Earth in the near future, performing the role itself is a kind of Ark. There is also the view that we are on the verge of star wars, and these objects have come to enslave the inhabitants of the Earth.

Many reputable scientists say that this story is nothing like another invention of the SETI, but really it’s just piles of debris. Continue reading

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