Alien invasion not happening anytime soon: Astronomers say Humans will take 1,500 years to find ET

According to astronomers, we don’t need to be worried about an extraterrestrial invasion anytime soon. Researchers estimate that it will take another 1,500 years for us to come across intelligent alien civilizations.

Scientists have concluded that the radio signals created my mankind have only ventured out some 80 light years into the Milky Way galaxy.


Researchers estimate that it could take around 1,500 years before we hear from other civilizations from elsewhere in the cosmos. According to calculations, astrophysicist believe that under one per cent of our own galaxy has been reached by man-made radio signals that are slowly making their way into outer space.

If we apply the same principle to the number of discovered alien planets, it means that its is nearly ‘impossible’ that we will contact our alien neighbors in the near future.

“We haven’t heard from aliens yet, as space is a big place – but that doesn’t mean no one is out there,” said Cornell student Evan Solomonides.

According to researchers, there are billions of Earth-like planets in our galaxy alone. However, we have still not encountered aliens yet.

Waiting around 1,500 years will give the human civilization the chance to develop even better technology that will help us in the search for our cosmic neighbors.

Researchers argue that TV and radio signals created my mankind have only ventured out some 80 light years into the Milky Way galaxy.

Looking at numbers, this means that our radio signals have reached around 8,531 stars which are believed to have some 3,555 Earth-like planets scientists concluded. However, this number is extremely small if we take a look at how big the universe really is.

Researchers have based their conclusion on the so-called ‘Mediocrity Principle’ which suggests Earth is not physically unique, and so will not be deliberately searched for by alien civilizations.

Researchers point that alien signals will most likely venture across the galaxy much like our own signals today.

Based on these conditions, researchers believe that it will take around 1,500 years,  before we are ‘in range’ of communication from distant worlds, for us to received a response from intelligent alien civilizations.

‘This is not to say that we must be reached by then or else we are, in fact, alone. ‘We simply claim that it is somewhat unlikely that we will not hear anything before that time. Even our mundane, typical spiral galaxy – not exceptionally large compared to other galaxies – is vast beyond imagination. ‘Those numbers are what make the Fermi Paradox so counterintuitive,’ said Solomonides.

‘We have reached so many stars and planets, surely we should have reached somebody by now, and in turn been reached. This demonstrates why we appear to be alone,’ added  Solomonides.

Astronomers estimate that there are around 200 Billion stars in our galaxy alone which is more than 100,000 light-years across. If we look a bit closer to where we are in the Milky Way, we find that our own solar system is located on an ‘arm’ of our galaxy which in turn is located around 26,092 lights years from the galactic center.

“It’s possible to hear any time at all, but it becomes likely we will have heard around 1,500 years from now,” said Solomonides. “Until then, it is possible that we appear to be alone – even if we are not. But if we stop listening or looking, we may miss the signals. So we should keep looking.”

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