Astronomy

This annular solar eclipse will only reveal its full glory to a select few, but onlookers across much of the Western Hemisphere can catch a partial glimpse of the dazzling phenomenon

Astronomers have a new term to describe the pain associated with the loss of access to dark skies: noctalgia

The equinox is not when day and night have equal lengths. Instead it’s something more nuanced but no less glorious

A new NASA instrument allows researchers to view the bright and permanently shadowed portions of the moon’s Shackleton Crater at the same time

Thousands of spacecraft circle Earth. Seeing them from the ground is surprisingly easy—and a lot of fun

Earth is bombarded by millions of bits of cosmic debris every day. Here’s how to distinguish between the different types

A new interpretation of Isaac Newton’s writings clarifies what the father of classical mechanics meant in his first law of motion

The doomed class of stars named Wolf-Rayets produce mysterious pinwheel shapes

Yellow, white or maybe even green—the sun’s hue depends on how you see it

August gets not only a second full moon but a rare super blue moon

Scientists debate what the future of the cosmos looks like and whether space will ever stop getting bigger and bigger

If you want to make it through the trials and tribulations of Mercury in retrograde, it’s easy: don’t do anything. You’ll be fine