The sun has become increasingly active since 2008, a new NASA study shows. Solar activity is known to fluctuate in cycles of 11 years, but there are longer-term variations that can last decades. Case ...

In this artist’s impression, a comet erupts with jets of gas as it falls toward the sun from the depths of the outer solar system. There’s a giant ball of ice barreling through the solar system right ...

The Voyager spacecraft, on a decades-long journey of exploration, have made an unusual discovery at the edge of our solar system. They’ve detected a layer of hot plasma at the solar system’s boundary, ...

The star at the center of the solar system does more than provide light and warmth. It also acts as the most powerful ...

Solar Orbiter flew closer to the Sun than ever before. This proximity let it capture electrons in pristine conditions.

Astronomers worldwide are tracking 3I/ATLAS, the third confirmed interstellar object, currently traversing our solar system.

Massive solar flares, graceful eruptions of solar material, and an enormous sunspot make up some of the imagery captured by NASA's Solar Dynamics Observatory in 2013 and 2014. A year ago this weekend, ...

The earliest images of 3I/ATLAS, newly uncovered by Michigan State University, reveal how the interstellar object evolved as ...

There’s a giant ball of ice barreling through the solar system right now, and it’s bigger than any we’ve seen before. It poses no threat to Earth, but this comet, called C/2014 UN271 ...

Webb uncovers methane on Makemake, showing the icy dwarf planet is more active than once thought - just like Pluto.

"Considering the direction and frequency of our most common signals gives insights into where we should be looking to improve ...

Super-Earths and sub-Neptunes, planets with sizes between Earth and Neptune, constitute approximately one-third of known exoplanets but are absent in our solar system. Their prevalence elsewhere and ...