It's possible that Venus and Earth once simultaneously existed as pleasant worlds hosting mild temperatures and oceans. Then, ...

G3 (ATLAS) should be visible from the southern hemisphere, and possibly also the northern hemisphere, over the next few days ...

As soon as it gets dark, two bright lights become visible—the brightest in the southwest and an almost-as-bright light in the ...

Engaging articles, breathtaking images and expert knowledge Issues delivered straight to your door ...