The sun rises each day, but the amount of sunlight reaching Earth’s surface is not as constant as we might think. A new study ...

Our Sun emits light, heat, high-energy radiation and electrically charged particles into space that constantly bombard the ...

Between April 9 and 19, Costa Rica will experience zenithal sun, a phenomenon that occurs when the sun's rays hit the country ...

While sunsets on Mars are uniquely moody, NASA 's Curiosity rover has captured a stunning image of a martian sunset, featuring light rays that illuminated a bank of clouds as the sun set over the ...