What was the first transmission from Earth sent into space, and what did it contain?

The closest thing to any information I can find here is related to Arthur C. Clarke's book (and the movie based on it), Contact. A speech from Adolf Hitler at the beginning of the 1938 Olympics is beamed back to Earth, and is claimed to be our first significant transmission. This smells like fiction, though, because I can't seem to find anything online that will confirm that (or tell me what the real first transmission was). This is for a writing project that requires authenticity, so I need an answer that I can confirm. Help me out if you know.|||Carl Sagan wrote "Contact" not Arthur C Clarke. And it was the 1936 olympic games that the nazis broadcast on television. And it really happened. It was the first really significant broadcast in shere power but before that many radiotransmission had had enough power to get into space (but earths ionosphere keeps alot of radio signals, especially FM, from getting out there). And possibly get picked up by aliens. But little bleeps in morse code wouldn麓t have been quite as dramatic as the nazi broadcast which is why Sagan chose it as the first transmission the aliens recieved...


As radiotransmission has been going on for a century over 400 stars have recieved them. Project Ozma now known as SETI (both run by Frank Drake) proposed we should start looking for radiotransmission from aliens and maybe deliberatley broadcast messages to them. Carl Sagan then said that maybe we shouldn麓t blurt out too much information about us just yet because have no way of knowing what their intentions might be. But a simple digital message was sent in the seventies towards a star cluster 33 000 lightyears away. So we don麓t have to worry about aliens coming to invade us just yet...





I suggest you do a couple of searches for SETI, Carl Sagan, Frank Drake, Project Ozma and Arecibo. I don麓t have all the dates in my head...|||Arthur C. Clark is absolutely correct for television signals but the first radio signals were made by Marconi.|||The first signal INTENTIONALLY sent into space was in 1974,at the Arecibo observatory