A recently discovered celestial body is rewriting our knowledge of the Kuiper Belt and maybe challenging the existence of the ...

OF201 spends only 1% of its orbital time close enough to us to be detectable. The presence of this single object suggests ...

The International Astronomical Union’s Minor Planet Center, which catalogs new moons and other small bodies in the solar ...

While astronomers continue to search for the mysterious "ninth planet”, a possible giant hidden in the extremities of the ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...

The universe's vastness challenges human comprehension. It contains trillions of galaxies and countless stars. Pluto's ...

Less than 1% of this dwarf planet candidate's orbit is close enough to detect, which means astronomers are lucky to have ...

Scientists have discovered a mysterious new object far beyond Neptune, and it could be one of the most distant dwarf planets ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a highly ...

Schindler said the discovery of Pluto – even though Pluto now is designated ... “That’s just not how science is done,” he said. “Science is done by acclamation, not by voting, but ...