A study shows major terrestrial events every ~27.5 million years. [Here]
Hypothetically, a planet with an aphelion of 91 thousand [not million] AU (just inside outer Oort) and a perihelion of, perhaps, just inside or outside 1 AU (Earth’s distance) could explain this cycle. It’s current distance would beyond all optical scopes.
Terrestrial explanations are mentioned as well.
Hypothetically, a planet with an aphelion of 91 thousand [not million] AU (just inside outer Oort) and a perihelion of, perhaps, just inside or outside 1 AU (Earth’s distance) could explain this cycle. It’s current distance would beyond all optical scopes.
Terrestrial explanations are mentioned as well.
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