Tag: radio signals

Scientists Show Our Place in the Galaxy

Article by Natasha Kumar                            June 16, 2020                           (thetimeshub.in)

• Despite the fact that we persistently listen to heaven through sensitive antennas, we still have not received any signal from an extraterrestrial civilization and none of them have responded to our messages. Adam Grossman from The Dark Sky Company has created a map of our Milky Way galaxy, illustrating the full extent of its huge size. A radio signal issued on one side of the galaxy would take 100 thousand light-years to reach the other side.

• On Grossman’s map (above), the little blue circle with a diameter of 200 light years around the Earth represents the maximum distance that the first radio signals have traveled from Earth over the past 100 years, since the radio was invented. In this radius of 200 light years around the Earth, there are no known habitable exoplanets, with liquid water and oxygen in the atmosphere.

• SETI (Search for Extraterrestrial Intelligence) is constantly listening to radio signals from space. But considering the size of our galaxy, we’d have to listen for signals for tens of thousands of years before humanity had a chance to establish contact with another civilization. Then double this time to receive a reply.

 

Are we alone in the Universe or at least in our galaxy? Despite the fact that we persistently listen to heaven your most sensitive antennas, we still have not received any signal from an extraterrestrial civilization and none of them respond to our messages. The Fermi paradox has tried to answer this question, but the answer can be simple, if you look at our milky Way galaxy to scale to rate how vast distances in space and realize that we simply do not hear.

Adam Grossman from The Dark Sky Company has created a map of our galaxy, so you can see the full extent of its huge size. And the milky Way is not the biggest galaxy in the Universe. The diameter of the milky Way is about 100-180 thousand light-years, depending on how you measure. That is, the radio signal issued in one side of the galaxy, you will need at least 100 thousand light-years to reach the other side.

Now, it is worth remembering that our civilization is familiar with the radio only about a century. And the little blue circle with a diameter of 200 light years around the Earth, represents the maximum distance that at the moment overcame the first radio signals from Earth. Below us to hear the alien civilization must be in a tiny radius. It should be noted that in the nearest 200 light years not found any habitable exoplanets, or at least with liquid water and oxygen in the atmosphere.

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Aliens May Discover Us Very Soon, Here’s Why

by Lorraine Lorenzo                  March 19, 2019                     (ibtimes.com)

• Clara Sousa-Silva, a quantum astrochemist, said during a segment in BBC’s online presentation “Ideas”: “We have been sending (television and radio) signals for the past 100 years, and those signals have gone into space and traveled at the speed of light and by now have reached hundreds of stars and hundreds of planets around them” There is a big chance that these aliens now know a lot about human origins, culture and history thanks to all the “material” that we’ve been sending them for years. “If there was an alien civilization then they would have heard the first BBC broadcasts… and have a rough idea of how our humanity works,” said Sousa-Silva.

• Sousa-Silva also said that some prominent scientists actually think that humans are sharing too much to the galaxy, especially since we know nothing about them. “Aliens may not be very kind so we shouldn’t be giving them our position.”

• But even without these television and radio signals, the Earth has a biosphere that basically gives any alien civilization an idea as to what type of species thrive in it. Aliens would be able to use a powerful prism to filter the white lights of our galaxy and separate the colors of the rainbow to determine our position in the universe. The shadows would tell them that this is indeed a lively planet filled with vast oceans and organic life forms.

• By the same principle of using radio signals to find earth, the scientist also believes that we can use alien biospheres to determine if there are extraterrestrials that actually exist in the universe. “At MIT, I develop the tools that try to decipher these potential alien biospheres. Those tools are how I will be listening in to alien messages. Until then I will try to find signs of life from signals aliens didn’t even mean to create,” Sousa-Silva said.

 

If you think that watching your favorite sitcom on Netflix or cable TV is just limited to entertainment, think again. We are also unknowingly sending vast signals to the universe and pretty much letting any possible aliens out in space know how to find us.

In fact, we’ve been sending out so many radio signals for the past 100 years that even if we turn off all satellites today, extraterrestrials from outer space will still be able to find us, Clara Sousa-Silva, a quantum astrochemist, said during a segment in BBC’s “Ideas.”

                      Clara Sousa-Silva

“We have been sending signals for the past 100 years and those signals have gone into space and traveled at the speed of light and by now have reached hundreds of stars and hundreds of planets around them,” Sousa-Silva, who is doing her post-doctorate degree in MIT and is a Ph.D. holder from the University College London, said.

The astrochemist said that the signals are now strong enough to be detected should there be alien civilizations out in the universe. Aside from this, there is also a big chance that these aliens now know a lot about human origins, culture and history thanks to all the “material” that we’ve been sending them for years.

“If there was an alien civilization then they would have heard the first BBC broadcasts and now they would have seen many, many years of Coronation Street and have a rough idea of how our humanity works,” she said.

Sousa-Silva also said that some prominent scientists actually think that it’s silly how humans are sharing too much to the galaxy especially since we know nothing about them.

“Aliens may not be very kind so we shouldn’t be giving them our position.”

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