It's very large, and has an extremely strong magnetic field, and it's a "rogue", not attached to any other object.
The so-called "rogue" planet does not revolve around a star, but instead rotates around the galactic center in interstellar space. The planet is skirting the boundaries of our solar system - just 20 light years from Earth - and may prove to be an invaluable source of astronomic knowledge.
The planet, which is 12 times as large as Jupiter, sits around 20 light years away from Earth. Nicknamed "failed stars", brown dwarfs are larger than planets, but not quite large enough to fuse hydrogen, the way stars do. It's a massive 200 times the strength of Jupiter's magnetic field. When researchers observed it again in a new study at even higher radio frequencies, they confirmed that its magnetic field was even stronger than first measured.More news: Minecraft movie delayed after change of director
The planetary-mass object has been classified as rogue meaning it's free-floating and is not hitched to any parent star.
Nevertheless, we still can't figure out how brown dwarf stars get auroras, considering they're nowhere near any type of stellar winds.
And, although it's 12.7 times more massive than Jupiter, it's only a little bit bigger, with a radius 1.22 times that of our gas giant.More news: President Urged to Stop Tweeting on Trump Tower Meeting Between Advisers, Russians
Such a strong magnetic field "presents huge challenges to our understanding of the dynamo mechanism that produces the magnetic fields in brown dwarfs and exoplanets and helps drive the auroras we see", said Gregg Hallinan, of Caltech.
Those are the processes that this new object, named SIMP J01365663+0933473, might help astronomers learn more about. At its size, it's right between the size of a planet and a failed star, so scientists will need to study it further to determine exactly what it is. It's an absolutely massive alien world that is almost big enough to be classified as a brown dwarf. But since then, as our technology progressed, astronomers found that these stars also exhibit signs of magnetic activity, including the formation of powerful auroras - which on Earth are created by solar wind particles interacting with the planet's magnetic field.
The planet is believed to have scorching surface temperatures of around 825C.More news: ‘Supergirl’ movie in the works from DC and Warner Bros
The team is particularly excited by the new research because it relies in part on radio observations of the object's auroras - which means that radio telescopes may be able to identify new planets by their auroras. It is a component of the National Radio Astronomy Observatory (NRAO).