The researchers used the Very Large Array (Very Large Array), which recently was modernized. The updated version of the radio telescope was able to allocate some resources background radiation in space . Scientists have spent more than 50 hours of observation of one area of ​​the sky, who had studied the telescope Spitzer. Comparing the testimony of two instruments, scientists were able to determine that 63% comes from radio galaxies, which are at the center of a black hole, and 37% - from galaxies with rapid star formation.

Although research has undergone only one thousandth of the sky, scientists now say with certainty that 96% of background radiation comes from 2 million. Objects like what they have learned. The remaining 4% are of the opinion for 100 billion. A very faint objects, which is difficult to define.