Primary
❪◑❫ Spectral Types ○｜Definition｜1st｜20260713140717-00-⌔
Stellar classification - Wikipedia#Spectral_types
Spectral types
The stellar classification system is taxonomic, based on type specimens, similar to classification of species in biology: The categories are defined by one or more standard stars for each category and sub-category, with an associated description of the distinguishing features.1
Types F, G, and K are sometimes grouped into the category of “FGK stars” due to their similar stellar structures.2 Similarly, types G, K, and M are sometimes grouped into “GKM stars”, as they are of solar mass or less.2
Printed 2026-07-13.
(echo:: @ ᯤ)
Link to original Footnotes
Garrison, R. F. (1994). “A Hierarchy of Standards for the MK Process” (PDF). In Corbally, C. J.; Gray, R. O.; Garrison, R. F. (eds.). The MK Process at 50 Years: A Powerful Tool for Astrophysical Insight. Astronomical Society of the Pacific conference series. Vol. 60. San Francisco: Astronomical Society of the Pacific. pp. 3–14. ISBN 978-1-58381-396-6. OCLC 680222523. ↩
Secondary
• • •