{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"55a2855ff9755b0f12625b26f7c8e35f5f693594464473580fb4c5c8c8efa7f9","created":"2026-10-03T07:18:02Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["0487acdd76aca5ebb933a1d6218d08fe70e3fbc586f75d8ad0a1a5be637029a1","5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"9e176ce11eca2ed6d8f718f0e1e733209794467c3256d8ae68bea46949377f15","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"earth.earth-moon-origin.angular-momentum","kind":"well-posed","literature_status":"contested","n":"1","parents":[{"note":"","parent_revision":"0487acdd76aca5ebb933a1d6218d08fe70e3fbc586f75d8ad0a1a5be637029a1","relation":"special_case"}],"plain":"Some impact scenarios that mix Earth and impactor well leave the system spinning about twice too fast. They work only if a gravitational resonance with the Sun later removed the extra spin.","posed_since":"","precise":"High-angular-momentum scenarios (fast-spinning proto-Earth, synestia) require removal of roughly half the post-impact angular momentum, for example by evection resonance capture. Determine whether resonance capture and escape occur for realistic tidal parameters of the early Earth and Moon. An answer is a tidal-evolution calculation giving the angular momentum removed as a function of tidal model, with probability of the required outcome.","problem_ref":null,"references":"","settled_by":"Coupled orbital and tidal evolution models with self-consistent Earth and Moon dissipation across the plausible parameter range.","status_note":"","title":"Could the Earth-Moon system have shed a large angular momentum excess?","topic_ref":"2c5f38711046508a948faca95664ccbcabc745d5947f380901ca76f3f292f063"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"fa8eb501f1194f4526d682698f12886e2713eec4e5cbef616ca0b38f59e8cff2","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"e549665e90805ad82d8ded40deffab082d97d692a359c000fe2fa74271fdb984","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"6KM8NOqF5rldDo2FMi_BeFhBDPYIf6dmNdPzLmaSWAvCpLEWxoUJBWEnrp1CFUNZyyWcrkQLOj01nYvSBzsfDQ"},"schema":"pubphys.envelope/1"},"record_hash":"fa8eb501f1194f4526d682698f12886e2713eec4e5cbef616ca0b38f59e8cff2","leaf_index":1303}