https://www.space.com/astronomy/solar-system/astronomers-discover-a-cosmic-fossil-at-the-edge-of-the-solar-system-is-this-bad-news-for-planet-9
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Astronomers discover a cosmic 'fossil' at the edge of our solar system. Is this bad news for 'Planet 9'? - Space
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7/16/25 at 6:00pm
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Space.com
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Robert Lea
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"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today."
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