The research by Professor Mathieu Gkentz, Imperial College London, published in the journal "Geology", shows that a portion of cosmic dust falls on Earth, comes from an ancient zone of asteroids between Mars and Jupiter.
The cosmic particles of dust, asteroids and comite products, are tiny pieces of powdered rocks, hundreds of billions of which fall through the sky of our planet and are everywhere - and in our homes!
They along until one-tenth of a millimeter and cover the entire solar system within one minute smog.
The study of these particles is important because the fossil formation is essentially a log of creating conditions of asteroids and comite before 4.5 billion years.
The origin of this outer space dust constantly landing on Earth, has always been uncertain.
After detailed study of 600 chemical compositions of such particles, Dr Gkentz concluded that comes from a family of ancient space rock, called asteroid Koronis between Mars and Jupiter, which arose before about 2 billion years, when a much larger asteroid split into pieces.
Specifically, the dust comes from a smaller group of 20 space rocks within the Koronis family, said asteroid Karin, who created the birth of the solar system.
Meteorites like Karin often fall on Earth and Dr Gkentz was able to match the mineralogy and chemical data with those cosmic dust samples meteorite already collected. Combining these data with astronomical infrared ray satellite data, found that asteroid Karin continually clashed with each other, creating the dust.
