Have you ever imagined that somewhere else you are? That in a distant mirror universe, there is another version of yourself.
The mirror universe is often an interest in science fiction, but more than that, it has also been studied in theoretical cosmology, and with a new study of the Hubble constant, the mirror universe could no longer be just fiction. the “concept”. “
(Photo: NASA / Getty Images) 399379 01: The impression of this undated artist shows what the very early universe (less than a billion years old) could have been like when it went through a voracious start to star formation. lar, converting primordial hydrogen into a myriad of stars at an unprecedented rate.
“Cosmic tension problem”
The Hubble constant, often known as the Hubble parameter, is a measure of how fast our universe is expanding. Edwin Hubble was the first to establish this expansion using data from Henrietta Leavitt, Vesto Slipher, and others.
The measures of this expansion during the following decades were decided at a speed of approximately 70 km / sec / Mpc. Astronomers hoped that several methods could agree on a single number as our measurements became more accurate over time, but this did not happen because the measurements have become so accurate in recent years that they are no longer relevant. agreement. This is known as the problem of cosmic tension, according to Universe Today.
From now on, the observed Hubble values are divided into two groups. Measurements of microwave cosmic background fluctuations point to a lower value of about 67 km / sec / Mpc, while studies of distant supernovae produce a higher value of about 73 km / sec / Mpc. Theoretical physicists are trying to understand why something is wrong, and this is where the mirror universe could solve the problem.
The concept of mirror universe was first investigated in the 1990s to solve the problem of matter-antimatter symmetry. In the lab, we can make particles of matter, but we can also make particles of antimatter, and they are always delivered in pairs.
Therefore, a critical question arises: where did all the antimatter brothers go when particles formed in the early stages of the universe?
This new study examines how it could be used to solve the Hubble riddle.
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“A new idea”
The researchers found an invariance in the parameters without unity. The constant of fine structure, with a value of approximately 1/137, is the best known of these. In essence, you can combine measurable parameters so that all units are canceled, giving you the same number regardless of the units you choose, which is useful for theorists. When cosmological models are adjusted to fit the observed expansion rates, many parameters without units remain the same, implying an underlying cosmic symmetry.
According to Universe Today, if you apply this symmetry more generally, you can scale the rate of gravitational free fall and the rate of photon-electron scattering to match Hubble’s measurement methods. If this invariance is true, it means that there is a mirror universe, a universe that would have a slight gravitational influence on our cosmos.
It should be noted, however, that this study is primarily a proof of concept. That means it only explains how cosmic invariance could help solve Hubble’s constant problem, but it doesn’t prove it.
This will require a more complete model, but in the meantime, it is a new idea that could broaden our understanding of the Hubble constant.
For now, however, the mirror universe remains a fiction, a theory, and a concept.
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Written by Joaquín Víctor Tacla
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