The exoplanet is 170 million years old and weighs more than 23 times Earth's mass while being just 2 1/2 times its size.

Research findings are available online in the journal arXiv. The original story " Astronomers find an ultra-dense mega-Earth ...

Planets form from disks of gas and dust around young stars, but the gas needed for growth does not last forever. New ...

Jets, winds, and blasts of light tend to get rid of the building blocks of planets before they have a chance to assemble.

A global team of astronomers, led by the University of Warwick, have used a European Space Agency (ESA) telescope to discover a planetary system that turns our understanding of planet formation upside ...

A distant star system with four super-sized gas giants has revealed a surprise. Thanks to JWST’s powerful vision, astronomers detected sulfur in their atmospheres — a chemical clue that they formed ...

An international team of astronomers has discovered a distant planetary system that challenges long-standing theories of how planets form. Across our galaxy, astronomers routinely observe a ...

An artist's impression of the planetary system surrounding LHS 1903, a small red dwarf star cooler and dimmer than our Sun. (European Space Agency) (CN) — For decades, astronomers thought they had ...

Water-rich environments capable of forming stars and planets may have existed only 100 million to 200 million years after the ...