Resumen de All the light there ever was.

Alberto Domínguez, Joel R. Primack, Trudy E. Bell

• The article discusses light particles and photons of extragalactic background light, astronomical photometry, and sky brightness. The authors comment on German astronomer Wilhelm Olbers and Olbers' Paradox, extragalactic distances, and gamma ray research. Other topics include research in astronomy and wavelengths.