However, Zhang suggests humans may migrate to the icy moons Europa and Enceladus, which will become water worlds as the sun becomes a red giant. What did astronomers learn about Earth's potential ...

Selcuk Acar/Anadolu Agency via Getty If you're wondering why the sun has looked like a giant fireball in the sky ... the sun take on an unfamiliar orange-red hue throughout the early days of ...

Stars like our sun fuse hydrogen in their cores into ... At this stage, the star becomes a large red giant. Because a red giant is so large, its heat spreads out and the surface temperatures ...