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The 12 Strangest Objects in the Universe

Infrared Stream from Space

(Image credit: ESA/N. Tr’Ehnl (Pennsylvania State University)/NASA)

Neutron stars are extremely dense objects formed after the death of a regular star. Normally, they emit radio waves or higher-energy radiation such as X-rays, but in September 2018, astronomers found a long stream of infrared light coming from a neutron star 800 light-years away from Earth — something never before observed. The researchers proposed that a disk of dust surrounding the neutron star could be generating the signal, but the ultimate explanation has yet to be found.

Rogue Planet with Auroras

Newly described brown dwarf

(Image credit: Chuck Carter; NRAO/AUI/NSF/Caltech)

Drifting through the galaxy are rogue planets, which have been flung away from their parent star by gravitational forces. One particular peculiarity in this class is known as SIMP J01365663+0933473, a planet-size object 200 light-years away whose magnetic field is more than 200 times stronger than Jupiter's. This is strong enough to generate flashing auroras in its atmosphere, which can be seen with radio telescopes.