Diffuse Interstellar Band
Diffuse interstellar bands (DIBs) are absorption features seen in the spectra of astronomical objects in our galaxy. They are caused by the absorption of light by the interstellar medium. More than 400 bands are seen, in ultraviolet, visible and infrared wavelengths.
The origin of DIBs was unknown and hotly disputed for many years, and the DIBs were long believed to be due to polycyclic aromatic hydrocarbons and other large carbon-bearing molecules. However, no agreement of the bands could be found with laboratory measurements or with theoretical calculations.
Read more about Diffuse Interstellar Band: Discovery and History, The Nature of The Carrier
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