Earth’s older brother: If there is a planet in the nearby Alpha Centauri binary star system, it could be Earth-like in many ways, as models based on spectroscopic measurement data reveal. The exoplanet would therefore have a slightly larger iron core than Earth, an Earth-like rock mantle with a slightly higher proportion of graphite/diamond and a gas shell similar to the earth’s original atmosphere.
The red dwarf Proxima Centauri and the double star Alpha Centauri are our closest neighbors in space – and thus potential targets for future interstellar space missions. However, while three planets have already been discovered around Proxima Centauri, the search for Alpha Centauri is still ongoing. Because its stars are sun-like and not very active, an exoplanet in this system would be a more promising candidate for a “second earth” or even life in space.