Monday , March 8 2021

Scientists discover a new "super earth": an exoplanet closest to the sun – Scientific survey – cnBeta.COM



According to foreign media reports, astronomers have recently discovered a "super soil" that is only 6 light years from our planet and runs around a lone star closest to the sun. Barnard's Star b, named after her parent star Barnard's Star, is about 3.2 times the earth's mass and has an outer temperature of -170 °. C (-274 ° F), which means looking for extraterrestrial life on top seems to be an unlikely task.

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It is reported that the team of international astronomers behind the new discovery used a large amount of data collected from seven sophisticated instruments mounted on telescopes around the world to determine the location of the exoplanet. This is one of the most comprehensive datasets ever used and includes 20 years of observation data.

Barnard Star is the fastest moving star on the night sky. To find out if the star has an exoplanet that circles it, researchers have combed a lot of data to look for subtle changes in spectrum or light emitted by the star.

It is understood that changes in the wavelength can show that the orbit in the star-shaped path comes from gravity on a large rocky planet. These small disturbances can be measured very accurately thanks to ESO's HARPS spectrometer, one of the instruments used to observe Barnard stars, whose data can be tracked down to 3.5 km / h. Speed ​​changes.

In addition to the HARPS spectrometer, six other instruments also observe the Barnard star, which allows the research group to compare and verify.

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Ignasi Ribas, research scientist, Catalonia Space Research Institute and Space Research Institute of Spain said that after very careful analysis we have 99% confidence that the Earth is there, but they will continue to observe this fast-moving star.

According to the analysis, these astronomers have concluded that the Barnard star has a large rocky exoplanet which is approximately 3.2 times the mass of the earth. This will make Barnard star b closest to the ground.

It is understood that Barnard star b runs around her parent star every 233 days and her distance from the parent star is only 0.4% of the distance between the Earth and the sun. Although this huge exoplanet is very close to the parent star, it absorbs only 2% of the energy absorbed by the planet, as Barnard is a red dwarf. Compared to stars like the sun, red dwarfs are relatively small and have low temperatures. In addition, this newly discovered exoplanet is also thought to work in circulation near Barnard's snake line.

Although the discovery of this adjacent exoplan is in line with many current theories about the formation of the solar system. The superjord is considered to be the most common world of red dwarf formation, and the snow line is considered to be the expected circulation on the planet. Unfortunately, although the evidence is true, there are such planets, but the lack of energy and unchanging temperatures means that the dark Barnard star b will likely not be able to carry the plan of life that people know.

Related research reports have been published in the journal Nature.


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