“Why is angular momentum eternal”
@Tim Van Thanks for joining the group, Tim, and for your great question — it’s one of the most important questions in human history, because once people understand the eternal nature of angular momentum and see the fact that angular momentum is everywhere in nature, they will understand all physical phenomena in the universe: no more fabricated mysteries. Angular momentum is eternal because angular momentum conserves — energy conserves. There’s no other option because energy is the only entity that exists: wherever it is, it’s there, it can’t disappear into any other “place” because it’s the very definition of “place” itself. An intimately related principle is “there’s no nothingness”. Angular momentum being angular momentum, it just means rotational energy rotates eternally. From the elementary particles of electrons and positrons to the atoms and molecules to the astronomical bodies and to the entire universe itself, everything spins and rotates like a locked gear and all activities are happening according to the law of the conservation of angular momentum. In the Nicene Creed, the theologians talked about god begets god, or from god comes god. If you remove the theological bullshit and only retain the underlying logic, you would get “rotation begets rotation”. Thanks again and look forward to more discussions.