Post by Vierotchka on May 24, 2013 15:32:55 GMT -5
Scientists Measure All the Light in the Universe Going Back 5 Billion Years
By measuring the absorption of very high-energy gamma rays by supermassive black holes located in the centers of galaxies, called blazars, researchers have been able to measure the evolution of the EBL of the last 5 billion years indirectly, according to a new study. (Photo : REUTERS/NASA/JPL-Caltech/Handout )
Extragalactic background light, also known as EBL, is a term that refers to the ancient and young particles of light saturating space and a crucial data point in understanding those secrets in relation to the nature and evolution of the universe that remain locked.
However, because the solar system in which Earth is found is especially bright, accurately measuring the EBL is difficult in a similar manner that detecting faces in a crowd from a bright stage is difficult. For this reason, telescopes have not yet been able to accurately detect the total EBL and scientists have been left empty handed.