A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 ...

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

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 ...

an unusual clustering of icy bodies -- including comets and dwarf planets -- which stretches from Neptune and outward toward interstellar space. Six known objects in the Kuiper Belt have ...

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, along with dwarf planets like ...

Scientists have been searching for a ninth planet to explain the orbital eccentricities of Uranus and Neptune (and dwarf planets like Sedna and Pluto) for more than a century. For the past decade ...

Jess Thomson is a Newsweek Science Reporter based in London UK. Her focus is reporting on science, technology and healthcare. She has covered weird animal behavior, space news and the impacts of ...

a disk of comets and other small objects beyond the orbit of Neptune. In 2015, NASA's New Horizons probe passed Pluto and spotted signs of recent geological activity in the dwarf planet's thinning ...

New dwarf planet discovered beyond the orbit of Neptune James Webb telescope discovers frozen water around alien star Jupiter is shrinking and used to be twice as big, mind-boggling study reveals ...

Pluto is one of the largest objects in the Kuiper Belt, a region beyond Neptune primarily filled with small, icy objects. Despite its reclassification from planet to dwarf planet in 2006 ...

Dwarf planet Pluto sticks out because it’s off ... that have to be explained by some sort of additional object beyond Neptune. “However, all of this has been understood for quite some time ...

Scientists have discovered a ring system around a small object beyond the orbit of Neptune, a surprising ... in question orbits Quaoar, a small dwarf planet that lies more than 4 billion miles ...