Publications of the Astronomical Society of the Pacific, the technical journal of the Astronomical Society of the Pacific (ASP), has been published regularly since 1889, as part of the ASP’s mission ...

The principles involved in setting up any viable system of spectral classification are discussed. Their application is illustrated by reviewing the essential features of the original MK system of two ...

To describe a new method, the Optical Coherence Tomography (OCT) Glaucoma Staging System, for classifying retinal nerve fiber layer (RNFL) damage assessed with OCT. The OCT Glaucoma Staging System was ...

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 ...