Scientists have plans to use telescopes as a way to signal our existence to alien worlds, perhaps putting us in contact with E.T., or the predator or even the engineers from Alien – which should end well for Humanity.
The idea is to create a beacon we could target at the planets orbiting stars closer than 20,000 light years away. Using a 1-to-2-megawatt laser focused through a Massive 35-40-meter Telescope could create an infrared beam strong enough to stand out from the sun's energy.
An alien Observer would be able to tell that there was something different about the energy coming from our solar system and investigate. And maybe insert its Unborn young into our stomachs using a face-hugging delivery system.
Near star systems such as Alpha Centauri appear to have planets in their habitable zone, namely Proxima Centauri b. If that planet was host to an advanced type of life we could send a signal there in a reasonably short period of time.
Communications would take just 4.4 years at the speed of light.
Systems like TRAPPIST-1 are more distant at 40 light years away but have seven planets. There are three planets in the system that are habitable by life as we know it.
All of these systems are close enough for us to send morse code signals to and maybe even receive a response
The suggestion is that because of the dangers of such a large laser we should construct it on the moon. That would reduce the risk of scrambling aircraft systems if they were Flew overhead.
James Clark of MIT admits calling E.T. maybe not really a good idea, but suggests that we should have a debate.
Stephen Hawking warned us that attempts to contact Aliens would be a disaster. He claimed that even if we received a signal first it would be a mistake to answer.
His argument was that any Aliens advanced enough to detect signals from Earth could be billions of years more advanced than us, and might Destroy civilization as we know it.
Toward the end of his life Hawking was convinced that we were not alone in the universe. "As I grow older I'm more convinced than ever that we are not alone" he said in a movie called Stephen Hawking's Favorite Places.