Meteoric dust

For example, in Sweden, noticed black dust on the snow, which turned out to be iron-space origin. In the deepest parts of the sea, away from the coast, water allocates little rainfall, the latter, especially the so-called red deep-sea ooze, contain a brown-yellow grains of iron-doped nickel, from 0.5 mm in diameter, these grains were bronzite chondrites, the presence of latest in marine sediments indicate that a large portion of the underlying sediments formed from meteoric dust. Meteorites "fall from the sky." What is their origin? With a heavenly body crashes down are they? From what regions of the world space flies them to us? To address these important and difficult questions have been asked a lot of hypotheses, and although at the present moment one of them has a huge number of supporters, but these questions are far from being resolved. Initially thought that the meteorites represent the condensed pair of world space, that look and still finds supporters. Later meteors were seen as products of lunar volcanic eruptions and subsequently this view was rejected, but most recently nominated again by the astronomers, and became again a subject of discussion. But in order to overcome the attraction of the moon and start an independent movement around it and the Earth, volcanic bombs were supposed to fly from lunar volcanoes with frightening speed. On the other hand, approaching the Earth, they might not possess the great speed of flight, which is actually observed.