Astronomy on MSN

What is the origin of the letters used in star classification?

What is the origin of the letters used in star classification? Why didn't astronomers use ABCD? J. HaldimanChicago, Illinois ...
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Hubble Has Discovered a Mysterious Star in the Milky Way, Dubbed the ‘Blue Lurker’, That’s Defying Stellar Evolution

In 2025, one might assume that all types of stars in the Milky Way have been cataloged, yet the universe continues to surprise us. In 1953, American astronomer Alan Sandage revolutionized our ...
Astronomy

What is the origin of the letters used in star classification?

Stellar spectral types were initially arranged alphabetically; however, subsequent detailed observations led to the consolidation and reordering of categories, establishing the current OBAFGKM ...