Monthly releases from the Royal Astronomical Society report that NASA’s TESS telescope, dedicated to finding exoplanets, has so far examined 75% of the sky. On this basis, astronomers developed a list of the stars around which earth-sized planets orbit.
Astronomers Lisa Kaltinger of Cornell University and Joshua Bieber of Lehigh University decided to change the “observation point” to identify the planets from which the earth can be viewed as a transient planet.
According to the researchers, such observers, if they actually existed, could not only discover our planet with the help of spectrometry methods, but even discover signs of life on it, during more than two billion years of the presence of oxygen in the earth’s atmosphere.
Using the European Space Agency’s TESS catalog and Gaia space telescope data, researchers selected 1,004 sun-like stars that may be orbited by Earth-like planets. These stars are approximately 300 light years from Earth. According to the scientists, from this distance it is possible to discover chemical effects of life on earth.
According to the researchers, all exoplanets that “see” the earth are in the plane of their rotation around the sun. So once a year it can observe the passage of the earth against the background of the solar disk, which at this moment loses a little of its brightness.
Scientists believe that if we are to make contact with external civilizations, we must focus our research on the planets from which it is possible to see Earth’s transit.
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