On the side of the Sun facing Earth, a giant coronal hole appeared in the shape of an enormous love heart, many times the ...

Solar activity has been on an overall decline since the ‘80s and scientists were expecting us to plunge into a historic low ...

Earth has a number of mini-moons and quasi-moons. Mini-moons are objects that orbit our planet. But they make for fickle fans: They tend to swing around Earth for only a matter of months. One example ...

Fifty-five years after the first Earth Day, climate activists are organizing a nationwide celebration of solar power.

Here's what happens as the direct rays of the sun slip south of the equator as the seasons change.

The autumnal equinox arrives Monday, marking the start of the fall season for the Northern Hemisphere and the spring in the ...

The Sun’s intensity ebbs and flows over decades, and during periods where it’s more intense, it’s more prone to solar storms.

This skywatching quiz will test your knowledge of how eclipses, when to see them, and what makes each one so spectacular.

The bottom half of the world, known as the Southern Hemisphere, is about to be treated to a partial solar eclipse that won't be visible in the US.

After witnessing a Total Lunar Eclipse or Blood Moon, skygazers across the globe are in for a treat today as the last solar ...

A new NASA mission will capture images of Earth's invisible "halo," the faint light given off by our planet's outermost atmospheric layer, the exosphere, as it morphs and changes in response to the ...

Astronomers are racing to study 3I/ATLAS, an interstellar comet whose strange behavior reveals new clues about how other ...