Mercury spill closes Sunspot Solar Observatory and nearby forest trails indefinitely, though officials say there is no public ...

Solar wind sounds poetic, but it's a very real and powerful phenomenon, connecting the Sun to every part of our solar system. Unlike the wind we feel .

While visions of Mars colonies, floating cities above Venus, and humans exploring distant moons inspire wonder, the reality ...

Although Mercury was geologically active in its early days, today its surface appears almost completely static. This is why ...

The smallest planet in our Solar System may be hiding a big secret. Curious bright streaks on Mercury's surface, doodled on its craters and slopes, are probably a sign of very recent geological ...

Find February Sky Events Latest News, Videos & Pictures on February Sky Events and see latest updates, news, information from ...

Snapchat, the popular messaging app known for self-deleting messages and fun chat features, also offers a paid plan called ...

Mercury has long been cast as the solar system’s burnout case, a small rocky world that cooled quickly and then froze in ...

A young star called V1298 Tau is giving astronomers a front-row seat to the birth of the galaxy’s most common planets. Four massive but extremely low-density worlds orbiting the star appear to be ...

An analysis of 100,000 satellite images of Mercury has revealed traces of changes that challenge the image of a "dead" planet.

Astronomers have found thousands of exoplanets around single stars, but few around binary stars—even though both types of stars are equally common. Physicists can now explain the dearth.

This rare alignment unfolds low in the western sky during twilight, 30-45 minutes after sunset, where the brilliant white glow of Venus meets the subtler orange-white shimmer of Mercury.