December's full moon is known as the Cold Moon or the Long Night Moon because it occurs during the longest periods of ...

The world of Smithsonian scholars is vast and limitless—from the oceans to outer space, from the prehistoric past to the dawn of the digital age. This year, they worked to bring the public such ...

About 45 minutes after the sun sets on Wednesday, you'll see the waxing crescent moon and about three degrees above it will ...

UK scientists used hundreds of tiny fossils that lived in the sea at the time to understand climate shifts tens of millions ...

The Sun's activity is what gives us beautiful auroras — but it also has dramatic negative effects on satellites that go ...

Chicxulub is the asteroid impact that wiped out the non-avian dinosaurs and many other living organisms across the planet 66 ...

The two brightest nighttime objects, the moon and the planet Venus put on a lovely display in the western evening sky of ...

Two massive asteroids hit Earth around 35.65 million years ago, but did not lead to any lasting changes in the Earth’s ...

The “blood moon” effect occurs only when there is a full moon and the sun, Earth, and moon are precisely aligned so that our ...

I pick out North America’s celestial highlights for the week ahead (which also applies to northern hemisphere mid-northern ...

Gifted with life on this beautiful planet, we have both a responsibility and capacity to sustain it. We’d come to Shinglemill ...