A New Itinerary Of Earth's Catastrophic Past

Recent study shows that our planet may have been pelt with asteroids long before some scientists had previously thought.
In a study published today, the researchers homed in on a phenomenon called giant planet migration. That's the name for a stage in the enlargement of the solar system in which the largest planets, for reasons that are still ambiguous, began to move away from the sun.
According to layout on records from asteroids and other sources, the group estimated that this solar system-altering event occurred 4.48 billion years ago, it is too earlier than some scientists had formerly planned.
The research of Mojzsis said, could provide scientists with valuable clues around when life might have first arrive on Earth.
Mojzsis, a Professor in the Department of Geological Sciences, said that "but until this study, nobody knew when it happened." Professor also added that "we know that hulking planet exodus must have taken place in order to explain the current intermittent structure of the outer solar system”.
Apollo astronauts collected a report that it is a debate that, at least in part, comes down to moon rocks. Many of which seemed to be only 3.9 billion years old, it is 100 times younger than a moon itself.
To explain those ages, some scientists recommended that our moon, and Earth, were crashed by a deluge of comets and asteroids around that time. But not everyone agreed with the theory, Mojzsis expressed.
He also expressed that - "It turns out that the part of the moon we landed on is very unusual".
To get around that bias, the scientists decided to amass the ages from a comprehensive database of meteorites that had crash landed on Earth.
Co-author Ramon Brasser of the Earth-Life Science Institute, Tokyo said in a study "The surfaces of the inner planets have been largely adapt both by impacts and endemic events until about 4 billion years ago".
For the research team, that presented only one possibility: The solar system must have experienced a major assault just before that cut-off date.

By: Tripti Varun
Content: https://www.sciencedaily.com/releases/2019/08/190812130821.htm