See the largest and most detailed 3D map of the universe ever

that Dark Energy Spectrophotometer (DESI), currently pointing to the sky from his home on the Nicholas U Mayal Telescope at Kit Peak National Observatory in Arizona, tasked with mapping the expansion of space, investigates dark energy, and create the most detailed 3D maps of the universe.

It’s only been seven months since the DESI mission and we already have record-breaking 3D images of the galaxy around us, proving DESI’s capabilities and space-mapping capabilities.

DESI has cataloged and mapped over 7.5 million galaxies, with over 1 million new galaxies added each month. By the time the survey ends entirely in 2026, it is believed that more than 35 million galaxies will be mapped, giving astronomers an enormous library of data for prospects.

“There’s so much beauty in it,” Astrophysicist Julian Gay said: From Lawrence Berkeley National Laboratory in California.

“In the distribution of galaxies on the 3D map there are large clusters, filaments, and cavities. They are the largest structures in the universe. But in it, you find traces of the earliest universe, and the history of its expansion since then. .”

DESI is made up of 5,000 optical fibers, each of which is individually controlled and positioned by its own tiny robot. These fibers must be positioned precisely within 10 microns, or less than the thickness of a human hair, and then catch flashes of light as they filter back to Earth from the universe.

Through this fiber network, the instrument captures images of the color spectrum of millions of galaxies, which cover more than a third of the entire sky, before calculating the amount of light. red shift – that is, the quantity pushed towards the red end of the spectrum due to the expansion of the universe.

Since this light can take up to several billion years to reach Earth, it is possible to use redshift data to determine the depth of the universe: the higher the redshift, the farther away it is. Furthermore, the structures drawn by DESI can be inverted to see the initial configuration they started with.

(Data by D. Schlegel / Berkeley Lab / DESI)

on top: Swipe through a 3D galaxy map from the completed Sloan Digital Sky Survey (left) and the first few months of dark energy spectroscopic instruments (right).

DESI’s main goal is to uncover more about dark energy, which is believed to make up 70% of the universe, as well as accelerate its expansion. This dark energy can propel galaxies into infinite expansion, causing them to collapse back into themselves or something in between – and cosmologists want to narrow down the options.

“[DESI] This will help us look for clues to the nature of dark energy,” said Carlos Frink, a cosmologist at Durham University in the UK. He told the BBC.

We will also learn more about dark matter and the role they play in how galaxies like the Milky Way form and how the universe evolves. “

The 3D maps that have been released show that scientists don’t have to wait for DESI to finish its work to start benefiting from deep space observations. Other DESI-enhanced research is exploring whether smaller galaxies have galaxies of their own black hole Like a big galaxy.

The best way to detect black holes is to determine which gas, dust, and other matter was dragged into them, but it’s not easy to see them in smaller galaxies — something that should be helped by the high-resolution spectral data collected by DESI.

Then there are studies quasar, especially bright galaxies powered by supermassive black holes, which serve as clues back through billions of years of space history. DESI will be used to test a hypothesis about quasars: that they begin to be surrounded by a dust envelope that is pushed back over time.

The amount of dust around a quasar is thought to affect the color of the light it emits, making it an ideal function for DESI. The tool should be able to collect information about about 2.4 million quasars by the time the survey is complete.

“DESI is really cool because it takes things a lot dimmer and redder,” astronomer Victoria Fawcett said: from Durham University.

“We’ve discovered many exotic systems, including large samples of rare things that we haven’t been able to study in detail before.”

You can follow the latest news from Dark Energy Spectroscopic Instruments at the center Official home page.


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