This seems a perfectly reasonable assumption. It is just that we haven’t detected them so far because we haven’t been looking at the right place when a transmission reached the Earth. Some of these Alien civilisations are sending out signals over radio waves at the frequencies we expect. If this hypothesis is correct, extra-terrestrial intelligent life exists in our Milky Way galaxy and may be reasonably commonplace. Reason 1- Aliens are sending out signals- we just have not found them yet. Although I am sure that there are plenty of others which I haven’t covered.
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There are a number of possible reasons why SETI programmes have so far detected no evidence of alien signals (which is sometimes called ‘the Great Silence’) and, in this post, I will discuss some of them.
Define radio silence full#
It is becoming clear that the locality of our own galaxy is not full of advanced civilisations communicating with each other over radio waves, which some of the first SETI researchers in the early 1960s thought it might be. However, despite sixty years of searching, no extra-terrestrial alien signal has ever been detected and there is no evidence that intelligent aliens have ever visited Earth. These have looked at many thousands of stars over a large range of radio frequencies. Since the pioneering work of Frank Drake who looked for signals from two nearby Sun-like stars back in 1960 there have been a large number of searches for radio wave transmissions from aliens.
Define radio silence upgrade#
This money will be used to buy time on existing telescopes, upgrade equipment on these telescopes and for staff costs.Īlthough its profile has increased recently, SETI is by no means a new field. The programme is one of the Breakthrough Initiatives funded by the Russian billionaire Yuri Milner, who has donated $100 million. It will survey the 1,000,000 nearest stars, the plane and centre of our galaxy, and the centres of the 100 nearest galaxies for signals of alien origin. In 2016 the Breakthrough Listen programme started and is expected to run for ten years.
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SETI now has its own telescope, an array of 42 separate radio dishes known as the Allen Telescope Array. In recent years there has been an increase in interest in SETI (the Search for Extra-Terrestrial Intelligence).