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Scientists measure the brightness of the universe more accurately



Based on this method, the sky would have the brightness of a 60W incandescent lamp seen from a distance of 4 km. It would be extremely weak, but not completely jet-black.

Previous approaches relied on ultraviolet light from short-lived giant stars, but these were not as reliable as they might miss the weakest stars. The Blazar approach measures the light of each galaxy, even if they are too small to be detected. And while people had previously measured the background light between the galaxies, they were trying to study the light directly and had to fight the Milky Way's interference.

This is not a very accurate representation, at least not yet. In addition to the remaining 1

0 percent (important if it covers the known universe), it does not contain any light that hits dust and has been re-emitted as infrared. However, the scientists have factored in this dust, and it can only be a matter of capturing older blazars to fill in more data. As things stand, the information available could provide a much clearer picture of star formation in the universe, including the frequency of new stars.


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