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

Found in the northern sky, GJ 3378b is a potentially rocky world with liquid water on its surface, receiving 90% of the ...

Where did all the water come from? Water, water everywhere. It covers 70% of Earth’s surface and earns it the nickname “the blue planet.” And yet … where did it come from? How is it so abundant on our ...

The discovery of an Earth-like planet 4,000 light years away in the Milky Way galaxy provides a preview of one possible fate for our planet billions of years in the future, when the sun has turned ...

Add Yahoo as a preferred source to see more of our stories on Google. Yes, we've all been taught that the Earth is not flat, but it may shock you to learn that it's not perfectly spherical either. As ...

Scientists found an intriguing world in our galaxy. They confirmed the existence of a rocky planet, called a "super-Earth," that's some six times as massive as Earth. While the world HD 20794 d is ...

The planet, named GJ 523b, is around 170 million years old and more than 2.5 times the size of Earth. It has approximately 23 ...

Scientists have identified three Earth-sized planets orbiting two stars in the TOI-2267 system. Remarkably, planets transit around both stars — a first in astronomy. The system’s compact, cold nature ...

This artist’s impression shows a sunset seen from the super-Earth Gliese 667 Cc. Astronomers have estimated that there are tens of billions of such rocky worlds orbiting faint red dwarf stars in the ...

Scientists say they have detected promising signs that a planet orbiting a star 49 light-years from Earth could have an atmosphere, making it potentially suitable for life. Called LHS 1140b, the ...

One exploded star left behind six Earth masses of rocky planet material just 100 million years after the Big Bang, a ...