A possible dwarf planet, like Pluto, has been observed in our solar system, according to a preprint published in arXiv. The area of space where this planet was found was previously thought empty.

The unusual orbit of a possible dwarf planet, known as 2017 OF201, makes it less likely that our solar system contains a hidden ninth “Planet X” ...

Could our solar system have 9 planets after all? Astronomers may have confirmed possible existence. Pluto was reclassified as a dwarf planet in 2006.

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

A possible cousin of Pluto seems to be circling the far reaches of the solar system. The dwarf planet candidate 2017 OF201 travels in a superwide orbit, with the sun relatively near one end of its ...

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

2017 OF201 is likely one of the most distant visible objects in the solar system, but its discovery suggests there could be other dwarf planets populating that region of space.

Image Credit: images of dwarf planets from NASA/JPL-Caltech; image of 2017 OF 201 from Sihao Cheng et al. DOWNLOAD PDF VERSION The Solar System has just gotten a new official member. Currently ...

This new dwarf planet may exist at the edge of the solar system, possibly disproving Planet Nine's existence. This is the story of that newly encountered planet.

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