Final answer:
The spectral class, not Slater-Harris, classifies stars based on their spectra and surface temperatures, using a system devised by Williamina Fleming and revised by Annie Jump Cannon. This classification includes types O, B, A, F, G, K, M, L, T, and Y.
Step-by-step explanation:
The Slater-Harris classification is mistakenly mentioned in the context of this question. It appears that the student may have meant to refer to the spectral class or spectral type system used to classify stars. This classification system, based on the temperature and characteristics of a star's spectrum, includes the types O, B, A, F, G, K, M, and the more recently added L, T, and Y for cooler star-like objects. Stars are sorted into these spectral classes according to the presence of certain absorption lines in their spectra, which are indicators of the stars' surface temperatures. Additionally, for a more precise classification, stars within these spectral classes are further divided into luminosity classes, denoted by Roman numerals. The system of classifying stellar spectra was initially devised by Williamina Fleming and later revised by Annie Jump Cannon, who focused on the sequence of decreasing temperature and classified a vast number of stars in her lifetime.
In summary, spectral classification is a categorization of stars based on their spectra and surface temperatures, and it is essential for understanding star properties and behavior in astrophysics.