{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"fb8300e615b1031e7c27a345dbdc797521f1a0178185602cc937c675adfb712f","created":"2026-10-03T07:18:03Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"68dfe1213cdbf32c747df0511b4a2e7a01851e64f07b3cb8ebcee36c45bc40d6","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"earth.planetary-dynamos.saturn-axisymmetry","kind":"phenomenon","literature_status":"open","n":"1","parents":[],"plain":"A theorem says a dynamo (the flowing-metal field generator inside a planet) cannot keep up a field that is perfectly symmetric around the rotation axis, yet Saturn's field is tilted by less than a hundredth of a degree. Something must hide the asymmetric part.","posed_since":"","precise":"Cassini Grand Finale data bound Saturn's dipole tilt below about 0.01 degree, while Cowling's theorem forbids a dynamo-maintained axisymmetric field. Test whether a stably stratified, electrically conducting layer (for example from helium rain) with differential rotation filters non-axisymmetric harmonics strongly enough, consistently with gravity and ring-seismology constraints on interior structure. An answer is a self-consistent dynamo with such a layer reproducing the observed Gauss coefficients.","problem_ref":null,"references":"","settled_by":"Dynamo simulations with interior structure from gravity and ring seismology reproducing Saturn's measured field spectrum.","status_note":"","title":"Why is Saturn's magnetic field almost perfectly symmetric about its spin axis?","topic_ref":"d630b91b3d151b4fd563599f0c63c42ed19209d89bcb67e4ebbd2cdaddd50144"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"31261d32a2a6064320a912d9180e5ba5a833fa857e41311c8b2710438a3ad1ee","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"779da8e93a1700920790b8837ddced60ede711d38d931d57eb9fad5b722670c9","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"ZXUW2dyC5dsRK-gXIafoA9Hd45pUADRiKNYBhS_8ZjlBepf5swKIqEPX3BqhfGNb2Zo66bduSkqYOUh5mZByBg"},"schema":"pubphys.envelope/1"},"record_hash":"31261d32a2a6064320a912d9180e5ba5a833fa857e41311c8b2710438a3ad1ee","leaf_index":1358}