A group of scientists from the University of California believes that by 2029 hypothetical aliens will be able to contact the Earth.
In 2002, NASA sent radio waves to the Pioneer 12 probe using the usual protocol to send data and confirm that communication had been established.
This signal also reached a star about 27 light-years from our planet, where the transmission propagates upon contact with an object.
The University of California researchers hope that this signal will be intercepted by aliens who will return the call to Earth.
“This is a famous idea from Carl Sagan, who used it as a plot theme in the movie Contact,” admitted Howard Isaacson, a UC Berkeley astronomer and co-author.
The 1997 film Contact, based on a short story by Carl Sagan, tells the story of a SETI scientist who finds evidence of alien life on a distant planet 26 light-years from Earth and decides to make the first contact by sending signals in the form of a radio wave.
The study used signals sent from Earth to Voyager 1, Voyager 2, Pioneer 10, Pioneer 11, and New Horizons to determine where the signals might have traveled when they were sent. to the universe.
These spacecraft communicated with deep station network (DSN) radio antennas to download scientific and telemetry data, according to a study published in Astronomical Society Publications.
The station’s deep network is defined as NASA’s giant array of radio antennas that support interplanetary spacecraft missions as well as several Earth orbits.
The team determined that transmissions on Voyager 2, Pioneer 10, and Pioneer 11 had already met at least one star.
Pioneer 10 transmissions collided with a single white dwarf star in 2002. Pioneer 10 transmissions will collide with 222 stars by 2313. The earliest we can expect the transmission to return is 2029, the team’s report says.
References to Voyager 1 and New Horizons will see their first stars in the near future.
The team calculated that data close to the stars would be affected by the transmission by looking at the speed covered by the speed of light, one parsec every 3.26 years.
This allowed them to determine the time in years to reach each star, such as Voyager 1 transmissions that had not yet arrived.
The signal is expected to reach one in 2044, with all 277 stars beginning to transmit by 2341.
The study says: “The earliest time we can expect to receive a return transmission from possible intelligent extraterrestrial life encountered by the Voyager 1 transmissions is 2109.”
And the Voyager 2 transmissions detected two objects that were accessed in 2007.
By 2336, all 272 nearest stars will have been reached.
Signals installed on Pioneer reached the dwarf star in 2018, but scientists have said all 386 stars will receive a signal by 2317. They are looking for a return transmission in 2058.
New Horizons transmissions have not yet encountered a star, but they will contact one in 2119 and have detected 139 stars by 2338.
“The earliest we can count on is 2232,” the study says.
Transmissions to New Horizons won’t hit the star until 75 years have passed since any other spacecraft was sent.
This difference is primarily due to the fact that New Horizons has a later launch date and spends less time inside the heliosphere.
The work “gives extraterrestrial intelligence seekers a narrower set of stars to focus on,” lead author Riley Derek, an engineering student at UCLA, told PopSci.
In the study, Caitlin Rasmussen, an astrobiologist at the University of Washington who is not related to the paper, told PopSic that the study is “an interesting exercise, but unlikely to yield results.”
Source: Daily Mail