The megacomet spans a mind-blowing 137 kilometres wide, making it officially the largest comet ever measured. 9News
were catapulted into the Oort cloud from the newly formed solar system along with space debris from other planetary systems.
Researchers think that holds clues to our sun's long-lost twin, and is part of the binary system theory.Scientists believe the Oort cloud may have played important roles in Earth's history, such as causing the extinction of the dinosaurs.Continue reading
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