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

Two far-off planets are likely made of water, according to research conducted using NASA's Hubble and Spitzer telescopes.The so-called "water worlds" are orbiting a red dwarf star, the smallest ...

A faraway gas giant planet that's famous for being strangely "puffy" appears to have clouds that are made of tiny bits of sand. The sand likely acts as water does on Earth, falling like rain ...

When they compared the planets to the models, they found “that a significant fraction of their volume – up to half of it – should be made of materials that are lighter than rock but heavier ...