The James Webb Space Telescope has notched another milestone, capturing a direct image of one of the coldest and oldest known ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

OF201, the object belongs to the same all-star family as Pluto: dwarf planets. Its diameter, roughly 435 miles (700 km), is ...

Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have ...

A newly detected planet beyond Pluto is not just expanding our understanding of the Solar System, it might be quietly rewriting it. Astronomers from the University of Taiwan recen ...

Discovery of 2017OF201, a large trans-Neptune Object, challenges previous beliefs about the Kuiper Belt and hints at the ...

"We didn't know what exactly to expect from these first observations – the sun's poles are literally terra incognita,” Sami ...

The object’s aphelion the farthest point on the orbit from the Sun is more than 1,600 times that of the Earth’s orbit,” said Sihao Cheng, Institute for Advanced Study lead researcher, as the astronomy ...

The Kuiper Belt, a region of the solar system past Neptune’s orbit, is likely home to hundreds of thousands ... But since 2017 OF201 doesn’t follow the same pattern as other TNOs, it may stand against ...

Beyond the edge of Neptune, a distant realm of icy debris known as the Kuiper Belt stretches deep into space. This frozen ...