
This Newly Discovered Mini Planet Is Orbiting So Far It Takes 25,000 Years to Circle the Sun
A composite image showing the five dwarf planets recognized by the International Astronomical Union, plus the newly discovered trans-Neptunian object 2017 OF201. Credit: Images of dwarf planets: NASA/JPL-Caltech; image of 2017 OF201: Sihao Cheng et al. …