Take a Look at The Largest And Most Detailed 3D Map of The Universe Ever Made

CT scan of the universe in more than 5 billion light-years. (D. Slagel / Berkeley Lab / DESI data

The Dark Energy Spectroscopic Instrument (DESI), currently at the Kit Peak National Observatory in Arizona, is owned by Nicholas U. The Mile Telescope, directed from its home to the sky, is tasked with tracking the expansion of space, studying dark energy, and creating the most detailed 3D. Map. Of a universe that was never assembled.

It’s only been seven months since the DESI mission began, and we already have a record-breaking, stunning three-dimensional image of the galaxy around us, demonstrating DESI’s capabilities and the potential for space mapping.
DESI has already listed and tracked more than 7.5 million galaxies, with more than one million new additions per month. By the time the scan is fully completed in 2026, more than 35 million galaxies will have been mapped, giving astronomers a vast library of my data.

“There’s so much beauty,” says Lawrence astrophysicist Julian Guy in California. “In the distribution of galaxies on 3D maps, there are huge clusters, filaments and voids. These are the largest structures in the universe.

But inside of them you will find the story of the early universe and its expansion as DESI is made up of 5,000 optical fibers, each individually controlled and ionized by its own little robot. These fibers must be located precisely within 10 microns. Rather than the thickness of human hair, then the universe catches a glimpse of light as it filters through the earth.

Through this fiber network, the instrument captures millions of color spectrum images of the Milky Way, covering more than a third of the entire sky, before calculating how much light has been redshifted – that is, how much it has been pushed toward the red end of the sky. Spectrum due to the expansion of the universe.

It could take several billion years for this light to reach Earth, so it is possible to use Redshift data to see the depths in the universe: the bigger the Redshift, the farther away something will be. What’s more, the compositions mapped by DESI can be reverse engineered to see the initial composition in which they were started.


The main objective of DESI is to make 70% of the universe as well as to expose its dark energy which is supposed to accelerate its expansion. This dark energy can lead galaxies to infinite expansion, pushing them back to themselves or something in between – and cosmologists are eager to narrow down the options.

[DESI] It will help us to find clues about the nature of dark energy, “Carlos Frank, a cosmologist at the University of Durham in the UK, told the BBC. We will also learn more about dark matter and how it occurs, galaxies such as galaxies form, and how the universe evolves.
The 3D map that has already been released shows that scientists do not have to wait until DESI has completed its work to benefit from its deeper appearance in space, whether the smaller galaxies have their own black holes like the larger galaxies.

The best way to detect a black hole is to identify the gas, dust, and other material that is trapped in it, but it is not easy to see in small galaxies – something where high-precision spectral data collected by DESI should help. Then there is the study of quasars, especially bright galaxies powered by supermassive black holes, which serve as clues to billions of years of space history.

DESI will be used to test the hypothesis surrounding quasars: that they begin to be surrounded by a dust envelope that disappears over time. It is believed that the amount of dust around the quasar affects the color of the light it emits, making it suitable for DESI work.

Victoria Fawcett, an astronomer at the University of Durham, says the tool should be able to gather information about about 2.4 million quasars before completing its survey.

“We are looking for some weird systems, including large samples of rare items that we have never seen able to study in detail before.

Source: Science Alert

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