A quartet of Earth-like worlds, each about 20% to 30% the size of our planet, circle one of our closest stellar neighbors, a ...

Yesterday, Reddit user Jeckee posted this short GIF of the Earth as it appears to rise over the moon's horizon: The animation, which comes from this Apollo 10 footage, was just a bit too shaky for ...

While astronomers suspect there is at least one minimoon circling Earth at any given time ... Here's an animated GIF of our new mini-moon 2020 CD3, discovered by @WierzchosKacper.

At least one in every four stars like the sun has planets about the size of Earth circling in very close orbits, according to the first direct measurement of the incidence of such planets ...

Earth has a cool new snapshot itself — taken by a photographer from 70 million miles away. NASA’s OSIRIS-REx spacecraft took the pic days before going into orbit around asteroid Bennu on New ...

"We do not currently have a consensus whether Earth could avoid being engulfed by the red giant sun in 6 billion years." A planetary system anchored by a dead white dwarf star, located around ...