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Gerinski
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What are the facts by which we believe that it's spacetime itself which is expanding since the big bang and not that it's only the matter-energy in the universe which expands in a pre-existing unchanging spacetime canvas?
Gerinski said:What are the facts by which we believe that it's spacetime itself which is expanding since the big bang and not that it's only the matter-energy in the universe which expands in a pre-existing unchanging spacetime canvas?
Gerinski said:What are the facts by which we believe that it's spacetime itself which is expanding since the big bang and not that it's only the matter-energy in the universe which expands in a pre-existing unchanging spacetime canvas?
Scientists use a variety of observational and experimental evidence to support the theory of the expansion of spacetime. This includes the observation of distant galaxies moving away from us, the detection of cosmic background radiation, and the measurement of the redshift of light from distant objects.
The most compelling evidence for the expansion of spacetime comes from the observation of distant galaxies moving away from us. This phenomenon, known as the Hubble flow, shows that the further a galaxy is from us, the faster it is moving away. This is consistent with the idea that the fabric of spacetime is expanding.
The expansion of spacetime has a significant impact on the universe. It is responsible for the observed redshift of light from distant objects, which provides evidence for the Big Bang theory. It also explains the large-scale structure of the universe, as the expansion causes galaxies and clusters of galaxies to move farther apart from each other over time.
Yes, scientists have developed various methods for measuring the expansion of spacetime. One method is to use the redshift of light from distant galaxies, which can be measured using spectroscopy. Another method is to study the cosmic microwave background radiation, which provides a snapshot of the universe when it was only 380,000 years old.
No, the expansion of spacetime is not constant. In fact, it is thought to be accelerating due to the presence of dark energy, a mysterious force that is causing the expansion to accelerate. This is one of the biggest mysteries in modern physics and is an active area of research for scientists.