An American telescope to measure the expansion of the universe


The “Daisy” telescope in the United States has begun observing work aimed at drawing a three-dimensional map of the universe with unprecedented accuracy in order to better understand its expansion, according to what was announced, Monday, by the directors of this international project.The “Daisy” spectroscopic tool, which has been set up in the Arizona desert over the next five years, will focus its five thousand “eyes” made of optical fibers on the night sky, seeking to monitor and analyze the light of 35 million galaxies in different eras in the history of the universe.

Dark energy

This data is supposed to allow scientists to understand the mysterious force called “dark energy”, which is responsible for accelerating the expansion of the universe, according to a statement from the Berkeley Lab of the US Department of Energy, which oversees the program.

And due to the expansion of the universe, galaxies are moving away from each other. The farther away, the more light emitted from the shifts towards the long wavelengths of the observed spectrum, i.e. towards red, according to what the French Atomic Energy Commission participating in this astronomical mission explained.

By analyzing the energetic radiation of galaxies, the Daisy telescope will be able to measure this redshift associated with the velocity of distance, and thus provide information about the distance these galaxies are from Earth.

Triple map

Researchers will then be able to create a three-dimensional map of the universe with “unprecedented details, showing that the number of galaxies is ten times higher” than those known today, according to the French government agency.

Cosmologist at the Atomic Energy Commission Christoph Yish explained that the telescope can collect “five thousand spectrums of galaxies every 20 minutes.”


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