NASA explains how a safely view a 'ring of fire' annular solar eclipse. WARNING: People should always use protective solar eclipse eyewear when viewing a solar eclipse. Credit: NASA Goddard Space ...

The moon will pass directly in front of the sun on Feb. 17, setting the stage for a dramatic annular solar eclipse. When you purchase through links on our site, we may earn an affiliate commission.

Perovskite solar cells operated for months in low Earth orbit and tolerated radiation equivalent to decades in space, marking the most comprehensive orbital test of the technology.

In recent years, technological innovation has supplanted traditional factors, such as the size of military forces and regional hegemony, as the foundational element of national power—and therefore as ...