Earth is famously called the Blue Planet because over 71% of its surface is covered with water, giving it a striking blue appearance when seen from space. This water, in oceans, seas, rivers, and ...

Viewed from space, our blue planet seems as familiar as a long-time friend – so familiar that we forget how extraordinary it really is. As far as we know, our world is unique in the universe, defined ...

Our vast expanse of outer space provides endless star, moon, and planet gazing opportunities that truly define the term ...

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...

Ever seen a sunrise from the moon? These space images will leave you marveling at our planet and our universe. Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET.

April 22 is traditionally known as Earth Day, the occasion where we pause as temporary travelers on our 'blue marble' to honor and respect our precious planetary home and its immeasurable beauty, ...