Comet

Comet is a small astral body, as in the construction of the planet. Comets have unusual job, which sometimes lead comet near the Sun, and visible to the naked eye and telescopes with a relatively low strength. If such a comet is visible, is usually referred to as a tail of gas that early astronomers often mistaken for a shooting star. Most of the observable comets in our solar system comes from the Oort cloud, a cloud is composed of remnants of the sun provides. These materials are comets that orbit the Sun, because they are influenced by the gravity of the sun and other planets. As the individual planets, comets could be influenced by the gravity of planets, and this leads to the ellipse or oval type.

Usually people on the planet to see comet comet, he between the Earth and Sun is believed that the comet and its tail, sometimes the coma and tail, which reflect sunlight and improves visibility. As the comets orbit the sun can, these models are strange, people can only see passage of a comet in life.

In fact, comets are divided by the length of time it takes them to orbit around the Sun Comet in the short term is about 200 years or less to complete trip around the Sun Comet is much longer than 200 years to complete the journey. For example, Halley's Comet can be seen on Earth about every 75 years. This designation as a comet in a short time. His last appearance on earth, in 1986, and is expected to see it again in 2061.

The planet can capture the comet and the result can cause serious damage to the comet. Gravitational capture of comets break into small pieces and smaller pieces that can break the comet hit the planet and capture. Comet Shoemaker-Levy 9, was considered to be broken in 1993, and astronomers were able to establish that the impact on the atmosphere of Jupiter in 1994.

More often, people watching the night sky to think that they see "falling stars" are actually meteors and comets. There are thousands of small comets, which do not attract much interest. Time in life, such as Halley's comet are often seen as an exciting, given that most only see with the naked eye once.