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 ...

The TNO, which are described as minor planets that orbit the sun at a greater distance than Neptune, were found on the edge of our solar system.

A potential new dwarf planet has been discovered in the outer reaches of the solar system, and its existence poses the ...

A new memorandum has firmed up China and Russia's intent to lead the construction of a new lunar base to be completed by 2036, as NASA talks about scaling back its own lunar ambitions.