Artist's conception of exoplanet PSO J318.5-22, which was discovered floating through interstellar space without a parent star (Image: MPIA/V. Ch. Quetz
Multicolor image from the Pan-STARRS1 telescope of the free-floating planet PSO J318.5-22 (Image: N. Metcalfe & Pan-STARRS 1 Science Consortium)
If you think being stuck in a strange town late at night after the last bus has gone is lonely, then give a thought for the exoplanet PSO J318.5-22. Discovered this year by astronomers at the University of Hawaii, this planet was found floating through interstellar space without a parent star and is one of the smallest free-floating objects seen outside of the Solar System.
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