Astronomers Have Calculated Aliens Could Notice The Earth
Astronomers Have Calculated, Aliens Could Notice The Earth
Scientists from Great Britain and Germany have calculated that areas of the Milky Way. Their calculations were based on the fact that outside observers can use the same methods that are used to search for exoplanets.
With the help of powerful telescopes, such as Kepler, astronomers were able to find several thousand exoplanets. Most of them were discovered by the transit method.The period of fluctuations in the brightness of the star is thus equal to the period of revolution of the planet, which makes it possible to calculate certain characteristics of the celestial body.
The period of fluctuations in the brightness of the star is thus equal to the period of revolution of the planet, which makes it possible to calculate certain characteristics of the celestial body.
Astronomers estimate that an outsider has more chances to notice planets close to the Sun (Mercury, Venus, Earth, and Mars) than giant planets (Jupiter, Saturn, Uranus, and Neptune).
Larger planets close more light when they pass before their star. However, the distance to the star remains the most important factor: since planets of the terrestrial type are drawn much closer to the Sun than gas giants, they are easier to spot by the transit method.
According to the astronomers, a random observer can see at least one planet of the solar system with a probability of 2.5%, two planets – 0.2%, chances to see the transit of three planets – 0.02%. of the several thousand known exoplanets today, only 68 are suitable for observing the transit of the planets of the solar system, with 9 of them you can see the Earth. In addition, according to the astronomers, there should exist about 10 life-expecting and still unknown exoplanets from which it is possible to open the Earth.