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 ...

"Meanwhile, its perihelion—the closest point on its orbit to the sun—is 44.5 times that of Earth's orbit, similar to Pluto's orbit." This extreme orbit, which takes the object approximately ...

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 ...

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

Phoebe's physical properties, as well as its odd orbital characteristics, led the authors to conclude that the moon formed in the Kuiper Belt region, making it a cousin to Pluto. Phoebe's orbit is ...

Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

“Meanwhile, its perihelion—the closest point on its orbit to the Sun—is 44.5 times that of the Earth’s orbit, similar to Pluto's orbit.” This extreme orbit, which takes the object ...

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 ...