\section{Conclusion}

We have presented a framework that reconceptualizes atoms as three-dimensional spinning spheres rather than two-dimensional systems with angular momentum. This simple change in perspective leads to a spin-tether force formula that exactly reproduces the Coulomb force in hydrogen and makes successful predictions across multiple scales.

While the framework cannot replace dark matter or explain all cosmic phenomena, its successes at atomic and solar system scales suggest we may have identified a genuine connection between rotation and binding forces. The precise agreement for hydrogen atoms and planetary orbits, achieved with zero free parameters, is particularly striking.

The philosophical journey that led to these insights—from lying on the ground contemplating spacetime to watching a dog on a leash—reminds us that profound truths often emerge from simple observations. The recognition that \textbf{gravity is the centripetal force of spacetime} has guided this exploration and revealed that what we call different forces may be the same geometric principle manifesting at different scales.

We offer this work not as a complete theory but as a contribution to scientific discourse. The question ``Are atoms really 2D or 3D?'' may seem naive, but pursuing it has led to testable predictions and new ways of thinking about fundamental forces. Sometimes in science, the most childlike questions lead to the deepest insights.

As we await more precise measurements from lunar ranging, Gaia, and pulsar timing, we hope this framework inspires others to explore the geometric foundations of atomic physics. Whether our specific proposal proves correct or not, the journey of questioning basic assumptions remains valuable for scientific progress.

Perhaps most importantly, this work suggests that we are not cosmic wanderers in an indifferent universe, but are forever bound by the same geometric principles that hold atoms together. From the smallest to the largest scales, we are all spinning, we are all bound, and we are all home.

\subsection*{Acknowledgments}

The author thanks Caseway's Fast and Furious Bilbo for inspiration during daily walks where the leash metaphor first arose. Extensive discussions with AI systems (ChatGPT-4 and Claude) helped formalize mathematical intuitions. The author acknowledges limited formal physics training; any insights are despite, not because of, traditional education. Special recognition goes to those who dare ask simple questions about complex phenomena.

\subsection*{Data and Code Availability}

All computational analyses and supporting materials for this work are available at: \\
\url{https://git.esus.name/esus/spin_paper}

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