Stellar spectral types originally followed alphabetical order. But as astronomers observed more stars and obtained more detailed spectra, they consolidated some categories and reordered the remaining ...

This quiz will take you on a journey through the life cycle of stars, their classification, and the incredible processes that power them. When you purchase through links on our site, we may earn an ...

To understand how we classify and differentiate the stars we see in the sky, we first need to understand how they are born and change throughout their lives. Star formation begins with a massive cloud ...

By relating the spectral lines to the temperatures and abundances of elements in stars, Payne-Gaposchkin refined and explained temperature estimates for the different classifications of stars, for ...

From 19th-century glass plates to today’s high-resolution spectrographs, astronomers have developed ingenious ways to measure a star’s temperature, brightness, and chemical makeup. These measurements ...