What planet is most like Earth? Reseachers have identified several exoplanets similar to our planet, but none that are an ...

Rogue planets — worlds that drift through space alone without a star — largely remain a mystery to scientists. Now, ...

A new machine learning model has predicted that there are 44 Earth-like planets in other star systems in the Milky Way galaxy, with researchers from Switzerland claiming that the algorithm at the core ...

Astronomers believe the free-floating planet is around 22 percent the mass of Jupiter and lies 3,000 parsecs from the Milky ...

Are there planets beyond Earth where humans can live? The answer is maybe, according to physicists examining F-type star systems. Are there planets beyond Earth where humans can live? The answer is ...

A quartet of small, rocky exoplanets likely circle Barnard's Star, around 6 light-years from Earth, putting them in contention as targets of missions for future human generations. When you purchase ...

On Earth, you can look up at night and see the Moon shining bright from hundreds of thousands of miles away. But if you went to Venus, that wouldn’t be the case. Not every planet has a moon – so why ...

If the oceans of the world were filled with microbes that used retinal, the oceans would have reflected much more light in ...

A long-ago reshuffling of the giant planets in our solar system may have been instrumental in giving Earth its moon. For decades, planetary scientists have hypothesized that Jupiter, Saturn, Uranus ...

Early Earth may not have had the right ingredients for life — until a nearby Mars-size planet crashed into it, two new studies hint. When you purchase through links on our site, we may earn an ...

To observers from outer space, Earth's vast oceans and verdant landmasses make it appear as a blue world punctuated by green ecosystems. It's the only habitable world we humans have ever known, so of ...