Of all the things to worry about, the explosion of our sun is perhaps one of the least pressing. The Earth has seen five massive extinction events, and it's therefore natural to wonder whether we, as ...

A gigantic, backwards "letter S" recently appeared slap bang in the middle of the sun, moments before our home star unleashed a massive plume of plasma that later smashed into Earth, temporarily ...

On Jan. 31, 1958, Explorer 1 became the first satellite launched by the United States. Its primary science instrument, a ...