Diamond rain falls on ice giants Uranus and Neptune, where intense pressure and heat transform methane into crystallizing ...

As missions like NASA’s Hubble Space Telescope, TESS and Kepler continue to provide insights into the properties of exoplanets (planets around other stars), scientists are increasingly able to piece ...

Tests on olivine hint that water-rich exoplanets could generate H2O internally, possibly explaining ocean worlds and even some of Earth’s early water.

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A layer of diamonds up to 18 kilometers (11 miles) thick could be tucked below the surface of Mercury, the solar system's smallest planet and the closest to the sun, according to new research. The ...

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 and ...

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 towards ...

The Earth needs to chill and showering it in bling could be the way to do it. Scientists are interested in depositing diamond dust into the atmosphere in order to reflect sunlight and cool down the ...

LONDON (Reuters) - Astronomers have spotted an exotic planet that seems to be made of diamond racing around a tiny star in our galactic backyard. The new planet is far denser than any other known so ...