98.5% of the Sun is made up of two light chemical elements, hydrogen and helium, while the remaining 1.5% consists of other heavier elements such as carbon, oxygen, and iron. The abundance of these ...

Scientists have identified a never-before-seen supernova, SN2021yfj, which exploded after losing nearly all of its outer layers. Instead of light elements, it revealed silicon and sulfur from deep ...

The study of stellar astrophysics and galactic structure investigates the life cycles of stars and the organisation of galaxies. At its core, the field explores how stellar evolution, from the ...

For centuries, the Ring Nebula has captivated astronomers with its stunning, glowing appearance, but a recent discovery has ...

"Based largely on lecture notes developed for ... courses given ... at Cornell University and at the University of Colorado" https://siris-libraries.si.edu/ipac20 ...