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Seeing Dark Energy’s True Colors: DESI Creates Largest 3D Map of the Cosmos
A slice through the 3D map of galaxies from the first few months of the Dark Energy Spectroscopic Instrument (DESI; right). The earth is at the center, with the furthest galaxies over 10 billion light years away. Each point represents one galaxy. This 2D slice of the 3D DESI map shows only about 800,000 of the 7.5 million galaxies currently surveyed, which is itself just a fraction of the 35 million galaxies that will be in the final map. Credit: D. Schlegel/Berkeley Lab using data from DESI
The more red shifted a galaxy’s spectrum is, in general, the farther away it is. With a 3D map of the cosmos in hand, physicists can chart clusters and superclusters of galaxies. Those structures carry echoes of their initial formation, when they were just ripples in the infant cosmos. By teasing out those echoes, physicists can use DESI’s data to determine the expansion history of the universe.
“Our science goal is to measure the imprint of waves in the primordial plasma,” said Guy. “It’s astounding that we can actually detect the effect of these waves billions of years later, and so soon in our survey.”
Understanding the expansion history is crucial, with nothing less than the fate of the entire universe at stake. Today, about 70% of the content of the universe is dark energy, a mysterious form of energy driving the expansion of the universe ever faster. As the universe expands, more dark energy pops into existence, which speeds up the expansion more, in a cycle that is driving the fraction of dark energy in the universe ever upwards. Dark energy will ultimately determine the destiny of the universe: will it expand forever? Will it collapse onto itself again, in a Big Bang in reverse? Or will it rip itself apart?
A Quantum Approach to a Singularity Problem
Science POD
"It is like having a hole in space, where nothing can exist, but into which observers and everything else will fall nonetheless."
Casadio suggests that this can be envisaged as a piece of paper with a small hole in it. "You can move the tip of your pen on the paper, which represents the movement of a particle, but if you reach the hole your pen suddenly stops drawing and the particles suddenly disappear," he says. "This illustrates how singularities are theoretical obstacles preventing us from fully understanding nature."
This approach has revealed that certain singularities predicted theoretically do not affect quantities that can in principle be measured experimentally, and therefore remain harmless mathematical constructs.
"If our formalism survived scientific scrutiny and turned out to be the correct approach, it would suggest the existence of a very deep physical principle, so the choices of physical variables are rather unimportant," Casadio concludes. "This could be consequential for our understanding of physics, even beyond the subject of singularities."
emanation | ˌeməˈnāSHən | noun an abstract but perceptible thing that issues or originates from a source: she saw the insults as emanations of his own tortured personality. • the action or process of issuing from a source: the risk of radon gas emanation. • a tenuous substance or form of radiation given off by something: vaporous emanations surround the mill's foundations. • Chemistry, archaic a radioactive gas formed by radioactive decay of a solid. • (in various mystical traditions) a being or force that is a manifestation of God.
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To be design conscious you must be able to both separate and unite.
LINKS:
https://designconsciousness.blogspot.com/2021/11/dark-energy-dark-matter.html
https://designconsciousness.blogspot.com/2020/07/dropping-pebbles.html
https://designconsciousness.blogspot.com/2018/01/the-wisdom-in-knowing-and-understanding.html
https://designconsciousness.blogspot.com/2016/07/beyond-physicality.html
https://designconsciousness.blogspot.com/2016/01/design-metaphysics-implosion-of.html
https://designconsciousness.blogspot.com/2014/09/design-metaphysics-field.html
https://designconsciousness.blogspot.com/2013/11/galactic-solar-and-human-entrainment.html
https://designconsciousness.blogspot.com/2013/09/beyond-light.html
https://designmetaphysics.blogspot.com/2021/06/energy-in-motion.html
"To believe is to accept another's truth.
To know is your own creation."
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Edited: 05.22.2022, 06.09.2022, 06.24.2022, 08.14.2022, 02.11.2023, 09.01.2023, 10.15.2023, 07.22.2024
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