In 1925, grad student Cecilia Payne first proposed that stars were mostly made of hydrogen and helium and shaped our ...

New ground- and space-based infrared observations are giving astronomers a better handle on the true populations of red ...

Stars are born from the great reservoirs of cosmic material (mostly hydrogen and helium, the most common elements in the universe), and they shine with exuberant energy for millions or billions of ...

01 times that of our own sun, but their mass is about the same. Stars like our sun fuse hydrogen in their cores into helium. White dwarfs are stars that have burned up all of the hydrogen they ...