Meteorites : General Information
Meteoritics is the study of meteorites. Meteorite Fragments. Uk Gifts From Out Of This World. Meteoroids originate in space. During entry into the Earth's atmosphere it is know as a meteor (or shooting star). After impact with Earth, it is known as a meteorite, or meteorite fragment. 3 Main Groups of Meteorite. Iron Meteorites. Stony-Iron Meteorites. Stony Meteorites. Meteorite Fragments make an ideal gift for anyone interested in space/astronomy, or geology. Your very own Meterorite: is a very special gift, unusual and totally different ! Meteoritics & Planetary Science. Meteoritical Society. Research and Education on Meteorites. Study Includes Meteorite fragments from outer space, found on Earth, The Moon and from Mars. Meteorite Fireballs usually brighter than magnitude 3. Nickel-Iron Meterorite. UK online Gifts shop. Meterorite to buy uk. Fell in Russia 1947: good specimen Meterorite. For Sale: Meterortie. Make Ideal Gift. Meterorite in box. Nickel Iron Meteroite Gift. Ideal gift for geologist. Very own Meterorite. Very special Gift, unusual and different. Totally Different Gifts : Meterorite Totally Different and Unusual Gift. Ideal for people interested in space, or geology. Millions of years travelling though space, impact in Russia 1947, formed during earths entry and on impact. Meterorite fragments and meteroite peices. Metallic, Nickel Iron Meteroites. Come back soon and see our gowning range of Meteorite online soon. The Sikhote-Alin Meteorite Fall. The Sikhote-Alin meteorite fell during daylight at 10:38 a.m. local time on February 12, 1947. Witnesses reported a fireball that was brighter than the sun. It came from out of the north -- about 15 degrees east of north and descended at an angle of 41 degrees. It left a trail of smoke and dust that was 20 miles long and lingered for several hours. Light and sound of the fall were observed for two hundred miles around the point of impact. The speed of Meteorite entry was estimated to be 14.5 kilometers per second. This is about 8.7 miles per second or 31,000 miles per hour. As the meteorite entered the atmosphere some of it began to break apart. The group of Meteorite fragments fell together. When the descending group of meteorites reached an altitude of about 3.5 miles, the largest Meteorite mass apparently broke up in a violent explosion. This was a very low altitude for such an event -- about half the altitude at which passenger jets fly. The Meteorite fragments scattered over an elliptical area of about a half a square mile. The largest Meteorite fragments made small craters and pits. One of these Meteorite measured 85 feet across and 20 feet deep. Sikhote-Alin Meteorite fall is one of the most spectacular falls of Meteorites in recorded history and one of a very small number of recent iron meteorite falls. Structure of the Sikhote-Alin Meteorites. The Sikhote-Alin Meteorite.is a coarsest octahedrite. The Widmanstatten bandwidth is nearly a centimeter. The bands are so large on this meteorite that if you were to saw and etch a smaller piece, you might see no crystal structure at all. While the structure may not be readily apparent in sawed and etched specimens, it can be seen in some individuals. The ablation in the atmosphere preferentially eroded along the crystal boundaries . Only a few meteoroides make their passage through the atmosphere in one piece. Most meteorite are fragmented on their way due to the high pressures to which they are subjected. Sometimes meteorite may burst into only a few fragments, at other times, into thousands of individual pieces creating a meteorite shower. Only a few pieces from such a shower actually arrive on Earth since all of the smaller meteorite fragments usually burn up during their passage. However, sometimes when the initial pieces are big enough, it literally "rains stones", and thousands of meteorites can be collected from huge strewn fields. One of the most impressive meteorite showers of the 20th century was the fall of Sikhote-Alin. On February 12, 1947, a huge iron meteoroid exploded over the mountains of eastern Siberia, Russia. Its fireball was as large as the sun, and a huge smoke train extended behind it (see the picture on the right, painted by the eyewitness Medvedev). More than 70 tons of individuals and fragments have been collected from its strewnfield, making it the largest fall in history. Due to atmospheric heating and resulting ablation, the individuals Meteroites developed smooth indentations, or regmaglypts, this is why each Sikhote Aline meteorite is unique
