Possibility of intercepting alien signals in 24 years
"I actually think the chances that we'll find ET are pretty good," said Seth Shostak, senior astronomer at the Search for Extraterrestrial Intelligence Institute (SETI) in Mountain View, California. In a report by Live Science, Shostak estimates that there is a good chance of interception of an alien signal within two dozen years. He bases this estimation on the Drake Equation, a formula conceived by SETI pioneer Frank Drake to calculate the number (N) of alien civilizations with whom we might be able to communicate. That equation takes into account a variety of factors, including the rate of star formation in the galaxy and the fraction of stars that have habitable planets, and the percent of those that develop intelligent life, and the length of time those signals would be broadcasted.
In 2008, in an effort to communicate with outer space, NASA Beamed Beatles' "Across the Universe" (written by John Lennon) into Space using strong signals. The transmission over NASA's Deep Space Network commemorated the 40th anniversary of the day The Beatles recorded the song, as well as the 50th anniversary of NASA's founding and the group's beginnings. The transmission was aimed at the North Star, Polaris, which is located 431 light years away from Earth. The song will travel across the universe at a speed of 186,000 miles per second.
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