Lyman alpha line of the hydrogen spectrum Lyman-alpha is a hydrogen spectral line that generally occurs in quasar spectra. It has vast significance in astronomy as most intergalactic spaces with neutral hydrogen clouds show Lyman-alpha forest with a bunch of Lyman-alpha absorption lines. It was named after the Harvard physicist Theodore Lyman. The Lyman-alpha spectral line results due to electron transition from the first stationary ground level of the atom to its immediate next higher orbicular configuration n=2 in the hydrogen spectrum. The Greek letter α denotes it, and its symbolization is Ly-α. In the same way, the Lyman series of the hydrogen spectrum initiates by the Lyman-alpha line. It lies in the vacuum-ultraviolet region. It is characterized by a strong absorption in the air. Hence, satellite-borne instruments are used to study the Lyman-alpha astronomy. The Lyman-alpha line in astronomy How was the hydrogen spectrum obtained? We are talking that Lyman-alpha occ...