The auroras on our planet are caused by its magnetic field interacting with the solar wind (the continuous flow of charged particles from the sun's upper atmosphere, known as the corona, that permeates the solar system).
They're calling it a "rogue" planet because it appears to be travelling through space without any kind of orbit around a parent star. A light year is equal to about 6 trillion miles.
"This object is right at the boundary between a planet and a brown dwarf, or 'failed star, ' and is giving us some surprises that can potentially help us understand magnetic processes on both stars and planets", said Caltech graduate student Melodie Kao, who led the study, in a statement.
In 2016, Dr. Kao and co-authors observed SIMP0136 with the Very Large Array (VLA) in order to gain new knowledge about magnetic fields and the mechanisms by which some of the coolest brown dwarfs can produce strong radio emission.
SIMP's magnetic field is over 200 times that of Jupiter's, notes the report.
It was detected using US National Science Foundation's Karl G Jansky Very Large Array (VLA) telescope.
They were also initially thought not to give off any radio waves, but in 2001, they were discovered to be absolutely teeming with magnetic activity. One rule of thumb in drawing the distinction is the mass below which fusion of deuterium is not possible - about 13 Jupiter masses.
On Earth, auroras are generated by interactions between its magnetic field and solar winds.
Both its mass and the enormous strength of its magnetic field, which is more than 200 times stronger than Jupiter's, challenge what scientists know about the variety of astronomical objects found in the depths of space. 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.
Once more data was obtained, the idea that SIMP J01365663+0933473 was a brown dwarf was scrapped. Latest measurements have established that the exoplanet has a surface temperature of 825 degrees Celsius (around 1517 degrees Fahrenheit), shows the International Business Times.
Studies that followed it demonstrated that certain brown dwarfs display strong auroras, similar to the ones seen in the Solar System's giant planets.
Kao's team used an advanced radio telescope located in New Mexico to make the discovery.