Of its jobs, the sun provides energy that is vital for life on Earth. This energy comes as a result of its immense heat. But how hot is the sun exactly? Here is what you need to know about the ...

If you think a sunny day here on Earth gets toasty, imagine how much hotter it would be if you were flying through the upper layers of the sun's atmosphere ... And that incredibly hot upper ...

has puzzled scientists for decades. "Why is the sun's corona so darned hot?" saidstudy member James Klimchuk of NASA's Goddard Space Flight Center in Greenbelt, Md. You may like Earth's skies ...