I. ALTHOUGH the observations made by Fraunhofer in 1814 first indicated that the spectra of stars were not all of the same character, it was the more systematic observations of Rutherfurd and Secchi ...

The following is an excerpt from The Glass Universe: How the Ladies of the Harvard Observatory Took the Measure of the Stars, by Dava Sobel. The monumental work of stellar classification known as the ...

WHILE it is now generally admitted that the spectroscopic differences between the different classes of stars are mainly due to differences of temperature, there are two widely divergent views as to ...

The night sky can be a wondrous place filled with stars, but there are some brilliant celestial lights that shine brighter than others. When you purchase through links on our site, we may earn an ...