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How long has Earth been broadcasting radio signals into outer space?
Wiki User
∙ 8y ago
Radio signals on Earth have been travelling outwards for almost 100 years, but the range is not very great because they go below the level of galactic noise quite quickly as they spread out.
Wiki User
∙ 8y ago
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How long ago has Earth been broadcasting radio signals into outer space?
Earth has been broadcasting radio signals into outer space since the late 1800's.
If there are 120 civilizations broadcasting radio signals in the Milky Way on average how many stars would we have to search before expecing to hear a signal assuming 500 billion stars in the galaxy?
The simple answer would be to divide 500 billion by 120, which gives an answer of slightly over four billion. The reality might be different, however. Just because a civilization is broadcasting radio signals does not mean that we necessarily can detect those signals. The Milky Way galaxy is 200,000 light years across on its long axis (80,000 on its shorter axis) and there are some stars which are so far away that it would take tens of thousands, even a hundred thousand years for a radio message to reach the Earth, and the hypothetical broadcasting civilization might not have been broadcasting for that long. And even if they were broadcasting long enough, the signal strength might not be enough to allow us to separate it from the background noise. And we might not be listening on the same frequency on which they are broadcasting. Those are just the most immediate complications.
The moon blocks radio signals sent from earth?
no You can even listen to the radio on earth. But there is no air to hear the music their though. (Sounds are passed through the air in sound waves)
What health risks are posed by having WiFi running 24-7 in your home?
No more risk than walking outside where Cell towers, cellphones, radio stations, etc are broadcasting MUCH higher powered radio signals.
How does a mars rover send signals?
The mars rovers communicate with earth via radio signals much like your a walkie talkie but much more powerful.
How long ago has Earth been broadcasting radio signals into outer space?
Earth has been broadcasting radio signals into outer space since the late 1800's.
Why all India radio using am broadcasting?
because more number of radio signals are through am
Are radio telescopes radioactive?
No - radio telescopes are (to put it simply) giant aerials. They gather radio signals from outer space, bringing them to a focal point. The signals are sent to computers for analysis.
How do long radio signals get back down to earth?
How do THEY get back to earth?!
What technology is used in a radio?
Wireless Transmission Technology makes Radio devices tune to specific frequency and play the audio being transmitted from Broadcasting Radio Station.Broadcasting Radio Stationbroadcasts audio signals (from Recording Studio)asradio waves to Radio devices within Radiowave signals range.
History of radio broadcasting in Nigeria?
Radio was first introduced to Nigeria in 1933 and was called the Radio Distribution System and was used by the BBC throughout the 1930s. In 1930 the Ibadan station was created. By 1956, Nigeria had created the Nigerian Broadcasting Corporation and became the primary broadcasting company in the country.
Do radio waves get through earth's atmosphere?
No, radio signals can come from broadcasting towers and can be received by radios, without the need for satellites; indeed, radio broadcasting originated long before the first satellite was launched.
Is radio Caroline still broadcasting?
radio caroline is still broadcasting on the internet
Radio communication between distant places on Earth is possible because the?
ionosphere reflects radio signals.
What has the author Giraud Chester written?
Giraud Chester has written: 'Television and radio' -- subject(s): Accessible book, Broadcasting, Radio, Radio broadcasting, Television, Television broadcasting 'Radio and television'
If there are 120 civilizations broadcasting radio signals in the Milky Way on average how many stars would we have to search before expecing to hear a signal assuming 500 billion stars in the galaxy?
The simple answer would be to divide 500 billion by 120, which gives an answer of slightly over four billion. The reality might be different, however. Just because a civilization is broadcasting radio signals does not mean that we necessarily can detect those signals. The Milky Way galaxy is 200,000 light years across on its long axis (80,000 on its shorter axis) and there are some stars which are so far away that it would take tens of thousands, even a hundred thousand years for a radio message to reach the Earth, and the hypothetical broadcasting civilization might not have been broadcasting for that long. And even if they were broadcasting long enough, the signal strength might not be enough to allow us to separate it from the background noise. And we might not be listening on the same frequency on which they are broadcasting. Those are just the most immediate complications.
How are space telescopes controlled?
Radio signals are sent from Earth, to operate the telescopes.
