{"id":4739,"canonical_url":"https://www.kudos365.com/today-in-history/events/1942ce-feb-27--4739","name":"1942 CE, February 27","year":1942,"era":"CE","month":2,"day":27,"url":"https://www.kudos365.com/today-in-history/events/1942ce-feb-27--4739","iso-date":"1942-02-27","precision":"year-month-day","description":"\u003cp\u003eBritish physicist James Stanley Hey discovered that the Sun emits radio waves, on February 27, 1942. His accidental discovery gave birth to solar radio astronomy and was crucial for both military radar development and the expansion of astronomy beyond the visible spectrum.\u003cbr\u003e\u003c/p\u003e","additional_details":"\u003cp\u003eHay had been tasked with solving WWII radar jamming; determined that the intense, noise-like interference was originating from a large sunspot and not from enemy jamming. Proving the Sun was a source of, not just visible light, but radio emission from an active sunspot. The finding was kept quiet for military reasons, Hey went back to study the radio waves after the war and confirmed in 1946 that these intense radio bursts from the Sun coincided with solar flares. \u003ca href=\"https://theskyisnotthelimit.org/scoping-out-radio-astronomy/2016/10/12/james-hey\"\u003eMore\u003c/a\u003e\u003c/p\u003e","photo":"","created_at":"2026-02-26T17:00:31-08:00","updated_at":"2026-02-26T17:46:01-08:00","breadcrumbs":{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"February History","item":"https://www.kudos365.com/today-in-history/february"},{"@type":"ListItem","position":2,"name":"February 27","item":"https://www.kudos365.com/today-in-history/february-27"}]},"schema":{"@context":"https://schema.org","@type":"Thing","@id":"https://www.kudos365.com/today-in-history/events/1942ce-feb-27--4739#eventK365","name":"1942 CE, February 27","headline":"British physicist James Stanley Hey discovered that the Sun emits radio waves, on February 27, 1942 - 1942 CE","description":"British physicist James Stanley Hey discovered that the Sun emits radio waves, on February 27, 1942. His accidental discovery gave birth to solar radio...","url":"https://www.kudos365.com/today-in-history/events/1942ce-feb-27--4739","additionalType":"HistoricalEvent","inLanguage":"en","datePublished":"2026-02-26T17:00:31-08:00","dateModified":"2026-02-26T17:46:01-08:00","publisher":{"@id":"https://www.kudos365.com/#organizationK365"},"temporalCoverage":"1942-02-27","isPartOf":[{"@id":"https://www.kudos365.com/#websiteK365"},{"@type":"CollectionPage","@id":"https://www.kudos365.com/today-in-history/february","name":"What Happened in February History"},{"@type":"CollectionPage","@id":"https://www.kudos365.com/today-in-history/february-27#pageK365","name":"What Happened on February 27"}]}}