Planet Nine Might Be Something Far Stranger Than a Planet featuring Kate Brown and Harsh Mathur

Beyond Neptune, a new class of KBOs with semimajor axes exceeding 250 astronomical units displays orbital anomalies sparking speculation about an undiscovered ninth planet. Yet, through the secular approximation, our guests offer an alternative explanation for these anomalies, predicting alignment of orbit axes toward the Galactic center and clustering in phase space, aligning with observations. Could MOND's capacity to elucidate galactic rotation without dark matter extend to the outer solar system, reshaping our cosmic understanding? Join us in unraveling the secrets of the Kuiper Belt and exploring the implications of MOND theory on our celestial neighborhood.

Modified Newtonian Dynamics as an Alternative to the Planet Nine Hypothesis
https://iopscience.iop.org/article/10...

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