A new study based on asteroid debris helps to understand how long this one lastedchaos.Astronomers
The authors of the new work studied iron meteorites -these are fragments of the core of larger asteroids. In particular, they studied their composition: isotopes of palladium, silver and platinum. By measuring the amounts of these isotopes, scientists can determine when certain events occurred in the early solar system.
The researchers collected samples from 18 differentmeteorites that were once part of the core of iron asteroids. They then isolated palladium, silver and platinum from them and used a mass spectrometer to measure the concentrations of different isotopes of all three elements. The specific isotope of silver is critical to the conclusions.
As a result, they were able to determine the timecollisions of asteroids with the Earth more accurately than ever before. It turned out that all the studied asteroid nuclei were discovered almost simultaneously, during the period from 7.8 to 11.7 million years after the formation of the solar system. For astronomers, a time span of 4 million years is not much. So they conclude that the early solar system could have been a very chaotic place where asteroids often collided.
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