We finally have the start of a detailed 3D map of the universe and the instrument capturing is only a few months into its mission.
This is the largest map of the universe everSome of the scientists with DESI presented the instrument’s performance so far at a Berkeley Lab-hosted webinar recently. Despite only being seven months into the survey run, DESI has smashed through all of the previous records for mapping the universe.
Over 5,000 optical fibers make up the instrument. Scientists can control and position each one exactly as needed. These fibers allow DESI to capture color spectrum images of the galaxies. DESI can then use these images to measure how much the light it captures has redshifted. Redshifting is a measure of how much the light has been pushed towards the red end of the spectrum.
Watching the redshift allows astronomers to determine how far away the light came from. This allows us to give depth to the universe. The greater the redshift, the farther away the item emitting it is. When looking at a map of the universe, this is important for measuring distance.The main objective of DESI is to reveal more about the dark energy found throughout the universe. Dark energy makes up around 70 percent of the universe, and it plays a big part in speeding up its expansion.
Furthermore, this will provide more information about dark matter and how it helps the formation of galaxies. Scientists will have a better picture of how big the universe is once DESI finishes its mission. It will also help us map out places we need to explore more.
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