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All 19 detections of the dwarf planet 2017 OF201, from August 2011 to October 2018. Credit... Cheng et al., arxiv.org, 2025. By Kenneth Chang.

Although it is substantially smaller than Pluto, which is 1,477 miles (2,377 km) across, 2017 OF 201 is nevertheless large enough to be classified as a dwarf planet. Problems for Planet Nine ...

A team of scientists at the Institute for Advanced Study School of Natural Sciences in Princeton, New Jersey, might have found a new dwarf planet, potentially leading to more evidence of a ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system. The object—which orbits out beyond Neptune—has been named "2017 ...

The five dwarf planets recognized by the International Astronomical Union are Pluto, Ceres, Eris, Haumea and Makemake—and these are pictured with 2017 OF201 in a telescope image. Dwarf planets ...

Pluto, the largest of those dwarf planets, has a diameter of about 1,477 miles (2,377 km). The mass of 2017 OF201 is estimated to be about 20,000 times smaller than Earth's and 50 times smaller ...

More information: Sihao Cheng et al, Discovery of a dwarf planet candidate in an extremely wide orbit: 2017 OF201, arXiv (2025). DOI: 10.48550/arxiv.2505.15806 Journal information: arXiv ...

David Fickling Books has signed Sin Bin Island, the debut middle-grade adventure from Doug Naylor, the co-creator of the television show, Red Dwarf. Managing director and publishing director Liz ...

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At the top of her Thursday show, MSNBC host Nicolle Wallace showed the clip of President Donald Trump snapping at a reporter who asked him about the new "TACO trade" nickname he's earned.