The Very Large Array in New Mexico has been observing the aurora, but not the northern lights on Earth. Other planets in our Solar System also have aurorae, but these recent observations have revealed aurora on a planet drifting through space some 20 light-years from our Solar System. The affectionately named SIMP J01365663+0933473 (hereafter SIMP J013) gives off the tell-tale polarized radio pulses that are linked to auroral activity in the Solar System. What makes this source particularly interesting is that it has a relatively low mass, estimated to be about 13 times the mass of Jupiter. This low mass means that it is more like a planet than like a star, raising questions of where the object came from?
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