Experts from the University of Toulouse conducted a number of studies which have been able to find an answer to the long-open question.
According to the results, the mysterious glow of the Universe is due to the large number of special substances called benzonitrile.
To this conclusion the researchers came after a detailed study of photographs taken with a telescope with the use of the infrared spectrum. When it is applied on the images stood out distinctly glow intensely red.
According to experts, benzonitrile has the ability to make the surrounding area red. Previously, experts believed that benzonitrile contains only in the vicinity of the warmer stars, but in reality it may be cold in space, but in such conditions its illumination is invisible even to telescopes.