With the presence of a large and mysterious Neptune superstar, Gliese 15A officially became the most polycentric planet near the Solar System ever known.
A giant planet, 36 times the mass of the Earth and a place of up to 20.8 years of the earth (7,600 days) has just been scientists from the Observatory of Astrophysics Turin (INAF - Italy) determined.
It is thought to be in the same form as Neptune, the massive solar system of the Solar System that should be called "Neptune Super" , officially known as Gliese 15A c .
The large planet Gliese 15A c, where can see up to 2 "red suns" - (graphic image from SCI-NEWS).
The planet is present at a great distance from the star Gliese 15A, so to be able to "see" it, the main author - Dr. Matteo Pinamonti and his colleagues had to use the technique of detecting the speed of penetration. center, a method based on the small vibrations of the parent star as the planets revolve and affect it.
Mother star Gliese 15A which belongs to a binary system of 2 red dwarfs is Gliese 15A and Gliese 15B . There are no known planets orbiting Gliese 15B; but with Gliese 15A this is the second "child" to be found.
The first planet of Gliese 15A with the name Gliese 15A b has been discovered since 2014. In contrast to Gliese 15A c, Gliese 15A turns too close to the parent star, each year only 11.44 days Earth. It is a super Earth with 3 times the mass of our planet, super hot with a surface temperature of 276 degrees Celsius.
With this new discovery, Gliese 15A becomes the closest multi-planet system to the Solar System with a distance of 11.6 light-years. The closest planetary system closest to us is Barnard, which possesses only one supercool earth, six light-years away.
The research has just been published in the scientific journal Astronomy & Astrophisics.