Meteor is the appearance of lines meteoroids fall into Earth's atmosphere, commonly known as shooting stars. Sighting
was caused by the heat generated by ram pressure (not by friction, as
was generally assumed before) at the time of meteoroids entering the
atmosphere. A very bright meteor, brighter than Venus apparition, can be called a bolide.
If
the meteoroid does not burn out on its way in the atmosphere and
reaches Earth's surface, the resulting object is called a meteorite. Meteor hit the Earth or other objects can be formed impact crater. (Wikipedia)
And following some kind of meteor showers that have fallen to Earth:
1. Orionid meteor shower
Orionid meteor shower appears every year, and peak around October 21. This meteor shower is clearly visible and looks up to 20 meteors per hour of green and yellow. Is the name of the Orionid meteor light in the sky at the point where they originated. These meteors can be seen all over the sky but the line of their movement would always be pointed toward the light. Orionid meteor light located near the constellation Orion. And rain caused by Comet Halley meteor that orbits around 75-76 years.
2. Perseid meteor shower
Perseid
meteors are the meteors that we may see most clearly and is usually
seen in the northern hemisphere during the night on a warm summer. Brighter and more, is associated with the Perseid comet Swift-Tuttle is amazing.
These
meteors appear to originate from a light in the constellation Perseus,
and occurs when the earth through meteor streams known as the Perseid
cloud which is actually the residue of the tail of comet Swift-Tuttle.
Most
of the Perseid cloud of dust from the thousands of years old, although
some of them are young dust evaporating from the comet in 1862.
Perseid
meteor shower has been observed around 200 years ago and is usually
seen from mid-July and a peak on August 12 each year.
3. Geminid meteor shower
Meteor
is not like other meteor that was born of a comet, but they come from a asteroid, a rocky planetoid near Earth named Phaeton 3200. In general, the asteroid does not generate dust into the air and even predicted earlier this asteroid was a comet.
Phaeton elliptical orbit like a comet and bring it even close to the sun than Mercury's orbit.The first Geminids appeared 150 years ago, and since then they bombard the earth on a regular basis every year in mid-December.
They are expected to be more on the meteor shower each year and recently has seen more than hundreds of meteors in the sky.
4. Quadrantids meteor shower
Many flashes of meteors seen in the picture below, although hindered by aurora green light next to his right.Visible red light is a light aircraft left astronomers that NASA DC-8 flew over Canada to study the Quadrantids meteor shower. With
the help of a special camera that can produce a composite image that
combines a short exposure, the researchers hope to learn from this
meteor shower which originally came from.
Because
of the strong appearance of this meteor, in early January, this meteor
shower is tentatively identified as a minor planet called planet 2003
EH1.
Possible meteor was also observed by astronomers from China, Japan and Korea since half a millennium ago. At the peak of appearance, this meteor shower will be seen less than 1 hour.
source : translate from http://terima.kasihlah.com
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