Dr. Eugene Parker, a pioneer in the field of heliophysics, has died at the age of 94. In the 1950s, Parker developed a theory that predicted solar winds. As NASA notes, Parker pushed the field forward ...

It all starts Saturday, Oct. 14, with an annular solar eclipse — often called a “Ring of Fire” eclipse, because only the outer limb of the sun will be visible when the eclipse is at its fullest. And ...