A massive super-Earth, dubbed Kepler-725c, has been discovered orbiting within the habitable zone of its host star, offering new possibilities in the search for Earth-like conditions beyond our solar ...

Astronomers have identified another object from this realm, with a diameter of roughly 310 miles (500 km), that has an ...

Today, we know of more than 5,000 exoplanets: planets outside our solar system that orbit other stars. While the effort to discover new worlds goes on, we’re steadily learning more about the ...

As telescopes have become more powerful, we’ve been finding tons of “exoplanets”—planets orbiting faraway stars. One such planet, known as exoplanet TRAPPIST-1 d, has intrigued astronomers looking for ...

About 71% of Earth’s surface is covered by water, and 96.5% of that water is found in the oceans.

Earth is the planet we have the best opportunity to understand in detail—helping us see how other rocky planets behave, even ...