Last February, astrophysicists used microlensing to discover for the first time planets outside our Milky Way. The object is now about 20 light-years from Earth and is also believed to have a moon.
The new object is wandering freely through the galaxy, untethered by an orbit to any star.
It was once thought that no such object could exist and the first failed star was not discovered until 1995. It's an absolutely massive alien world that is almost big enough to be classified as a brown dwarf.
More importantly, the team also noted that the planet is a magnetic powerhouse, with fields 200 times stronger than that of Jupiter. After being determined to be much younger and smaller than initially thought, SIMP may be classified as a planet, and not a brown dwarf.
However, the supermassive exoplanet or brown dwarf possesses a significant magnetic field by 200 times more potent than Jupiter and has a surface temperature of approximately 825 degrees Celsius. This fits with the object being between a planet and a brown dwarf and could provide valuable information about both groups.
The huge planet has a surprisingly powerful magnetic field. Kao and colleagues have found evidence of auroras on SIMP J01365663+0933473.
Of particular note is the presence of strong auroras, which typically involve a planet's magnetic field interacting with solar wind.
The odd "rogue" planet rotates around the galactic center in interstellar space. However, solitary brown dwarfs do not have a solar wind from a nearby star to interact with. SIMP could shed some light on this phenomenon, and finally allow astronomers to understand the causes of this process.
"This. object is exciting because studying its magnetic dynamo mechanisms can give us new insights on how the same type of mechanisms can operate in planets beyond our solar system", Kao said.
The initial contact happened in 2016, when astronomers believed that the planetary mass they recently discovered was a brown dwarf star. This fusion is the process that powers stars. It is estimated that the field is over 200 times stronger than the one present on Jupiter.