Earth's Twin Found Close To The Solar System
Аstronomers have discovered the exoplanet Kepler-1649c, which is extremely similar to Earth in size and surface temperature 300 light-years from the Solar system. The discovery was almost missed: it was "overlooked" by a computer algorithm that analyzed data from the Kepler space Observatory, but manual verification saved the situation. The description of the planet was published by the scientific journal Astrophysical Journal Letters, Gizmodo writes briefly about it.
"In terms of size and temperature, this is the most Earth-like planet that the Kepler telescope has ever found," said co-author of the study, Jeff Coughlin of the SETI Institute (USA).
The found planet orbits the red dwarf Kepler-1649. The data that astronomers now have allows us to say that it is very similar to the Earth. First, its diameter is only 1.06 times larger than earth. The second indicator that allows astronomers to make this conclusion is the equilibrium temperature of -39° C, it is closest to the earth's equilibrium temperature, 5° C.
Equilibrium scientists call the theoretical temperature that would be on the surface of the planet if it was a completely black body and would receive heat only from its sun. While other data about Kepler-1649c – in particular, the presence of an atmosphere on it or the reflectivity of its surface – scientists do not have, so this estimate is the most accurate in the available conditions.
In other respects, the new exoplanet looks much less like Earth – its star, Kepler-1649, is four times smaller than the Sun, the year on Kepler-1649c is 19.5 earth days, and there is probably no life on it. However, this is the most similar celestial body to our planet – previously, scientists found only planets that resembled the Earth either only in size or only in temperature.