3 civilization beyond earth background7/11/2023 ![]() “So if some planets can see us for thousands of years then we should also be able to see planets for a similar amount of time,” added Kaltenegger. “That provides a long timeline for nominal civilizations to identify Earth as an interesting planet,” reads the paper. The research also reveals that even very close stars have a good view of Earth as a transiting exoplanet for 1,000 years or more. 29 potentially habitable worlds orbiting some of these stars could have both seen Earth and received human-made radio waves.Four of the stars with confirmed exoplanets are located within 100 light-years of the Sun. ![]() 75 stars located within 100 light-years have received human-made radio waves in the last 100 years.Seven of the 2,034 stars are known exoplanet host stars.319 stars will see us in the next 5,000 years.1,715 stars from the Sun are in the right position to have spotted life on a transiting Earth since early human civilization (about 5,000 years ago).2,034 stars within 100 parsecs (326 light years) are in, were in or will be in the so-called “Earth Transit Zone” in the last and next 5,000 years.Kaltenegger’s research-conducted with Jackie Faherty, Senior Scientist in the Department of Astrophysics at the American Museum of Natural History, New York-reveals the following: MORE FROM FORBES We've Found 372 New Alien Planets Using A Long-Dead Telescope Say Scientists By Jamie Carter ![]() “We know that some of these stars already have planets, some even have planets in the habitable zone,” said Kaltenegger. Not all of those 4,422 exoplanets detected can see the Earth transiting the Sun-something that happens for only a few hours once per year-but, says this research, 2,034 stars are in, were in or will be in the so-called “Earth Transit Zone” in the last and next 5,000 years.
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