The diameter of Pluto, meanwhile, is 2,377 km. Further observations, potentially using radio telescopes, are needed to determine the object's exact size. Cheng discovered the object as part of an ...

Sihao Cheng, an astrophysicist at the Institute for Advanced Study’s School of Natural Sciences, led the team that discovered the object, which he described as an "extreme 'cousin' of Pluto," in ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region thought to be largely devoid of objects ...

Astronomers have just unveiled an extraordinary discovery in the far reaches ... The object, which may be a distant cousin of Pluto, has an orbital path so vast that it takes an incredible 25,000 ...

A new dwarf planet extremely far from the sun may have just been discovered ... could be a distant cousin of Pluto — and scientists mean "distant" quite literally. At its farthest point ...

Simultaneously cooling Pluto while energizing atmospheric molecules to allow them to escape into space, Pluto's haze plays a ...

Sihao Cheng, an astrophysicist at the Institute for Advanced Study’s School of Natural Sciences, led the team that discovered the object, which he described as an "extreme 'cousin' of Pluto," in a ...