New studies prove that the Earth formed much faster than previously thought.
Scientists from the Center for the Study of the Formation of Stars and Planets of the University of Copenhagen and the Paris Institute of Earth Physics have made a discovery that changes the idea of planet formation. This was reported in the journal Science Advances.
Experts conducted isotope studies that showed that the Earth formed in just five million years. It was previously believed that the emergence of proto-earth took much longer.
Scientists noted that if the age of the solar system is taken to be 24 hours, then the process of planet formation in its usual form took only a minute and a half.
By comparing iron isotopes from the Earth and in various meteorites, scientists have learned that CI chondrites are closest to Earth. These space objects are formed from primary cosmic dust.
Thus, scientists have confirmed the possibility of the formation of planets by accretion of cosmic dust – the cobbling together of individual particles into larger cosmic bodies. Previously it was believed that the planets were formed as a result of a collision of large space objects.
The theory of accretion also explains the appearance on Earth of water, which could also get to the surface with cosmic dust.