It was only seven months since Desi, an instrument that scans our skies from US soil, began its observation mission. And it is already delivering today the largest and most detailed map of the Universe ever produced. While waiting to provide astronomers with material to study, in particular, the history of our Universe.
It is in 2019 that theof the Desi instrument – for Dark Energy Spectrocopic Instrument, understand, spectroscopic instrument for the – opened for the first time on our Universe. On the side of the Kitt Peak National Observatory (United States). But validation phase and have been there. And it was not until last May that he really began to scrutinize the cosmos. So only seven months ago. However, he has already recorded data in quantity … astronomical! Across more than 7.5 million galaxies and . Enough to build the largest and most detailed map of the Universe ever produced. While the has not yet accomplished more than 10% of its five-year mission …
“This card is of great beauty, comments Julien Guy, researcher at Berkeley Lab, in one . It shows huge clusters, filaments and voids. The . Structures in which are hidden the imprint of the primitive Universe and the whole history of its expansion ”.
DESI’s monotonous productivity requires incredibly detailed control over the 5000 new generation robots that place the optical fibers of the instrument, ensuring that their positions are correct with less than 10 microns of error.
Credit: Claire Poppett/DESI Collaboration pic.twitter.com/YhbDl08j14
— Institute of Space Sciences (@iSpaceSci) January 13, 2022
Remember that the more the[display-posts orderby="rand"] from that comes to us from a galaxy is redshifted, the further that galaxy moves away from us. Thanks to the spectrographs attached to it, it is therefore these which open to Desi the from the depth of our Universe. And reveal clusters and which, billions of years later, still bear traces of the past. From that time when they were only ripples in the primordial plasma of our Universe.
The future of our universe and crucial information on exotic objects
A unique chance forto understand what future awaits our Universe. To understand what role what they call dark energy plays in its expansion. Because for that, you have to understand its history. How dark energy could have behaved in the past. And it is very precisely for this purpose that Desi was developed.
But we will probably have to wait until the end of Desi’s mission to obtain these answers. In the meantime, the instrument could provide astronomers with some keys to understanding other questions. That offrom intermediate, for example. A black hole can indeed be very difficult to find. Unless he attracts enough . And then forms an active galactic nucleus. In the largest of galaxies, this nucleus can be among the brightest objects in our skies. But in the smallest, it remains difficult to distinguish from a . But Desi should achieve it.
The instrument should also make it possible to better understand the. The brightest objects in our Universe. Researchers believe they are first surrounded by an envelope of dust. And that the light they emit makes her blush. As they age, they may well shed this dust and become bluer. By reporting data on nearly 2.5 million quasars, Desi could shed light on this theory. “This instrument is really great, rejoices Victoria Fawcett, astronomer at the University of Durham (United Kingdom). Beyond the quasars, it allows us to observe objects much weaker and redder than before. Systems that we had never had the opportunity to study ”.