Wed Sep 18 18:22:00 UTC 2024: ## Earth Sported Saturn-like Rings 466 Million Years Ago, Study Suggests
**Melbourne, Australia** – A new study suggests that Earth may have sported a Saturn-like ring system 466 million years ago, after capturing and shattering a passing asteroid. This debris ring, which could have lasted for tens of millions of years, may have caused global cooling and even contributed to the coldest period in the past 500 million years.
Researchers led by Professor Andy Tomkins of Monash University analyzed 21 crater sites around the world, all believed to have formed from debris of a large asteroid that broke up between 488 and 443 million years ago during the Ordovician period. By mapping out the craters’ locations based on past tectonic plate movements, the team discovered that all of them formed on continents near the equator, suggesting a common origin.
This unusual concentration of craters near the equator is consistent with a debris ring orbiting Earth, as such rings typically form above a planet’s equator. The probability of these craters forming from unrelated asteroids is incredibly low, estimated at about 1 in 25 million.
The study theorizes that a large asteroid, roughly 7.7 miles wide, came close to Earth and broke apart, forming a debris ring that gradually rained down onto Earth over millions of years. This explains the spike in meteorite impacts observed during the Ordovician period, as well as the presence of unusual meteorite debris in sedimentary rocks from this era.
The presence of a ring around Earth could have had a significant impact on our planet’s climate, causing global cooling due to the shadow cast by the ring on parts of Earth’s surface. This event could have contributed to the Hirnantian Ice Age, the coldest period in the past half a billion years.
While the researchers acknowledge that more evidence is needed to confirm the existence of Earth’s ancient rings, the study presents a new and intriguing possibility that could rewrite our understanding of Earth’s history and its climate. Further research, including analysis of specific asteroid grains within the studied impact craters, will be needed to solidify the hypothesis.
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