Sunspot region 4114 has unleashed its most powerful solar flare yet — an X1.9 class that erupted late June 19, triggering shortwave radio blackouts across the Pacific Ocean, including parts of Hawaii.

A NASA mission to observe the activity of the solar wind has returned its first images of giant coronal mass ejections (CMEs) ...

Mars and Regulus will remain close to each other until June 22. Now they are not so close to each other, but they can still be seen together with the naked eye. The best time to observe is right after ...

Gene Roddenberry’s son said his father was an atheist. But documented evidence tells a different, more nuanced story about ...

"There are so many slopes that are still unstable." Local hero steps up with incredible effort in wake of devastating ...