ScienceDiscovery of square hole in sun baffles NASA [VIDEO] A coronal hole in the sun is large, square and the star of its own film, thanks to NASA. A square hole in the sun is causing astronomers to question what caused the unusual formation.by James Maynard
ScienceNASA telescopes record intense X-class solar flare: Best-observed flare of all time [VIDEO]by James Maynard