"Super-Earth" has discovered the orbiting Sun the closest single star



Astronomers have discovered a frozen planet weighing more than three times the Earth, orbiting the nearest lonely star in the Sun. A potentially rocky planet, known as Barnard's star b, is a "super-country" and circulating around its host star once in 233 days, scientists from Queen Mary University in London in the UK say.

The findings, published in the journal Nature, show that the planet lies in a distant region from a star known as the "snow line".

This is far beyond the residential area where there could be liquid water and maybe life, scientists say.

The surface temperature of the planet is estimated at roughly minus 170 degrees Celsius, which means that it is probably a frozen world that is uninteresting for Earth's life, they said.

But if the planet has a great atmosphere, the temperature could be higher and the conditions could be more hospitable.

"The star of Barnard is a disgraceful subject among astronomers and exoplanet scientists because it was one of the first stars where the planets were originally required, but they later turned out to be wrong." "Let's hope we're right this time," says Guillem Anglada Escude of Queen Mary's School of Physics and Astronomy.

After nearly six light-years, Barnard's star is the closest star of the Sun after the triple Alpha Centauri system.

This is a type of low-weight star called red dwarfs. Red dwarves are considered the best places to search for exoplanet candidates, which are planets outside of our solar system.

Barnard's star b is the second closest known exoplanet of our Sun. The closest is just over four light-years from Earth.

This exoplanet, called Proxima b, circulates around the red dwarf star Proxima Centauri.

Researchers used the radial velocity method during the observation that led to the discovery of Barnard's Star b.

This technique detects variations in the star that are likely to cause the gravitational pull of the orbiting planet.

These waves affect the light coming from the star.

As the star moves towards Earth, its spectrum appears to be slightly shifted toward the blue, and as it turns, it is shifted toward the red.

This is the first time this technique has been used to detect a planet that is so small so far from the host star.


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