The Most Earth-Like Environmental Planet Found in 12.5 Years-Light-Distance-GIGAZINE


NASA / Harvard-Smithsonian Center for Astrophysics / D. Aguilar

International astronomy project to search for extrasolar planet similar to EarthCARMEN (Carmenes)The research team found two planets at a distance of about 12.5 light-years (about 118.260 billion km) from the solar system. According to the research team, one of the two planets is similar in temperature to Earth, and liquid water may be present.

The CARMEN look for exoplanets around Mnonsons Two planets of terrestrial masses tempered around the Star of Teegarden
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We have just found 2 of the Earth-like Exoplanets Yet only 12.5 light-years away

The two planets "Te Garden b" and "Te Garden c" discovered this time are 15.4 mag that exist in Aries.Tea Garden StarsIt is a planet that orbits the stars called about 4.9 days and 11.4 days, respectively. The tea garden star is a star discovered in 2003, at a distance of about 12.5 light years from the sun, and is at least 8 billion years old. Its mass is only about 8-9% of the sun.

by NASA / JPL-Caltech

Unlike a star whose presence can be visually confirmed to emit light itself, the planet can only be confirmed by its spectral change when it crosses in front of the star. However, as the activity of the star of the tea garden, which is a red dwarf, is very calm and its brightness is quite dark, remark was extremely difficult. The CARNEMES research team made accurate observations of the stars of the tea garden for three years using a 3.5 m telescope and a spectrometer installed at the Carralalto Observatory in Spain. As a result, the research team reports that the existence of tea garden and tea garden c can be confirmed from more than 200 measurement data.

On paper, the minimum mass of the two planets is close to the earth, and if the composition contains too much iron and water, they are expected to be near the earth. In addition, according to the research team, it is possible that the tea garden b, which orbits the interior of the two planets and is closer to the star, may have a warm surface environment with a temperature of 0 to 50 ° C, around 28 ° C. This On the other hand, the tea garden c that rotates from the outside has a surface temperature of about -47 ° C, which can be like a Mars-like environment.

"The two planets discovered this time are only slightly heavier than the Earth, and water may exist in liquid form," said Mathias Zechmeister, an astrophysicist at Georg August University in Göttingen.Living area"I belong to the

In addition, it is an index that represents the Earth as 1.00, "How similar is the planet or satellite to Earth?"Global Similarity Index (ESI)"The tea garden b is 0.95, and the tea garden c is 0.68". In particular, Tea Garden b is considered the closest planet to any of the already discovered planets.

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