Astronomers at Cornell University have compiled a list of 2,034 star systems, the estimated inhabitants
In order to understand what the Earth looks like from different stars, scientists used the transit method. Transit photometry is a method of detecting exoplanets based on observations of the passage of a planet against the background of a star. It allows you to determine the sizes, and in combination with the Doppler method, the densities of the planets.
As a result, it turned out that over the past 5 thousand.years, the Earth was and remains noticeable from 1715 star systems, and in the next 5000 years it will become noticeable from another 319 systems. You can see not only the Earth, but also the presence of oxygen, a complex organic matter, which with a high probability indicates the presence of life.
In addition, the inhabitants of 75 star systems on this list could also potentially capture Earth's radio transmissions, if they have the technology to capture them.
Even the stars closest to the Sun spend morethousands of years in a favorable position (can see the transit of the Earth through the Sun), which gives hypothetical extraterrestrial intelligent beings a long time to identify the Earth as an interesting planet.
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