{"echo_id":"dea89600-7811-4a73-a988-3a9bcf435510","kind":"person","canonical_name":"Christian Doppler","aliases":[],"summary":"Christian Doppler, 1803–1853. Mathematician and physicist. Über das farbige Licht der Doppelsterne (1842) states the effect named for him. Born 29 November 1803. Died 17 March 1853. This Echo is the name and span, not a biography.","years":"1803–1853","place_hint":null,"tags":["person","historical"],"verified":false,"public_publish":true,"primary_image_url":"https://media-vayati.s3.us-east-va.io.cloud.ovh.us/echoes/visages/dea89600-7811-4a73-a988-3a9bcf435510/98194b6cc9a0ac197440.jpg","primary_image_type":"upload","is_placeholder":false,"image_is_placeholder":false,"created_at":"2026-10-15T08:44:32.015Z","updated_at":"2026-10-15T08:44:32.475Z","parent_place_echo_id":null,"place_grain":null,"nested_places":[],"parent_place":null}