In 1890, Edward Pickering and his team at Harvard University developed the Harvard spectral classification system, which categorized stars based on their spectral characteristics. This system revolutionized the study of astronomy by providing a standardized method for classifying stars, enhancing our understanding of stellar properties and evolution. Pickering's work laid the foundation for modern astrophysics and influenced subsequent astronomical research.

Pickering's Harvard spectral classification system established in 1890 systematized stars, supporting scientific precision in Symbolist poetry. Poets like Charles Baudelaire drew on scientific advancements to enhance their explorations of beauty and perception.