This astronomer thought hed discovered a 9th planet in our solar system | Matt ODowd @TheInstituteOfArtAndIdeas

This astronomer thought hed discovered a 9th planet in our solar system | Matt ODowd @TheInstituteOfArtAndIdeas

Uploaded July 2026 | Updated September 2026, 1 week ago

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#space #astronomy #science #coolscience #sciencefacts #einstein @pbsspacetime

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This astronomer thought he'd discovered a 9th planet in our solar system | Matt O'Dowd