meteors.
A meteoroid is a piece of material, of variable size and shape located in interplanetary space may be attracted by the gravitational field of the earth and land on our planet.
Friction with the atmosphere there is a sharp rise in temperature causes a luminous phenomenon, visible, known as a meteor or shooting star.
When a meteor reaches a high brightness (magnitude -4 or higher) is called bólido.Por Finally, when a meteoroid manages to reach the earth's surface is called a meteorite.
For meteors visible with a magnitude of between 1 and 6 have a weight between 2 mg and 2 grams. But there are many smaller fragments that cause meteors undetectable to the naked eye, being the total amount of matter falling into a meteoric day on Earth, between 1000 and 10000 tons.
sporadic meteors can appear anywhere in the sky, or forming the so-called meteor showers. Any clear night is suitable for the observation of sporadic meteors, but are more frequent in the second half of the night.
During a meteor shower, meteor rate is usually higher. Some have come to rely 2,000 meteors per hour. If during a meteor shower meteor traces are represented in a star map, we see that they all seem to come from a point, that point is called radiant. Meteor showers are named for the constellation which is the radiant is located, such as Leonidas, whose radiant is located in Leo, Taurid (in Taurus), the Orion (in Orion), Persians (in Perseus), etc ...
As for the origin of meteor showers, they are associated with the cometary orbits, occur when the Earth crosses the orbit of a comet. The swarms of meteoroids and debris are remnants of comets that orbit the Sun in elliptical orbits. Sporadic meteors are caused by meteoroid swarms of old waste.
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