three pieces of evidence of universe exspansion support the big bang theory. the first piece of evidence, which edwin hubble discovered, is that _________________. the second piece of evidence is the change in universal temperature. the temperature______________. the third piece of evidence is that cosmic microwave background radiation is found_______________(.
Three pieces of evidence of universe expansion support the Big Bang theory. The first piece of evidence, which Edwin Hubble discovered, is that galaxies are moving away from each other and the space between them is expanding. This observation is known as Hubble's Law.
The second piece of evidence is the change in universal temperature. The temperature of the universe was much hotter in the past and has been cooling down over time. This is consistent with the idea that the universe originated from a hot, dense state, as predicted by the Big Bang theory.
The third piece of evidence is that cosmic microwave background radiation is found throughout the universe. This radiation is a faint afterglow of the early universe, which was discovered accidentally in 1965 by Arno Penzias and Robert Wilson. Its existence lends strong support to the Big Bang theory as it is considered a remnant of the intense heat of the initial expansion.
The first piece of evidence, discovered by Edwin Hubble, is that galaxies are moving away from us and from each other. This is known as the redshift of galaxies and is a direct consequence of the expansion of the universe.
The second piece of evidence is the change in universal temperature. The temperature of the universe has been observed to decrease as it expands. This observation is consistent with the idea that if the universe is expanding, then in the past it must have been much hotter and denser.
The third piece of evidence is the discovery of cosmic microwave background radiation (CMB). This radiation is found uniformly throughout the universe and is in the form of low-energy microwave photons. It is considered to be the remnant radiation left over from the early stages of the universe, shortly after the Big Bang. The existence of the CMB provides strong support for the Big Bang theory as it is a direct prediction of the theory.
The first piece of evidence of universe expansion that supports the Big Bang theory, discovered by Edwin Hubble, is that galaxies are moving away from each other. This observation is known as "Hubble's Law," which states that the farther away a galaxy is from us, the faster it appears to be receding. This suggests that the universe is expanding in all directions.
The second piece of evidence is the change in universal temperature. According to the Big Bang theory, shortly after the initial explosion, the universe was extremely hot and dense. As the universe expanded, it also cooled down. Scientists have measured the temperature of the universe using a phenomenon known as the Cosmic Microwave Background (CMB) radiation. The CMB is residual radiation from the early stages of the Big Bang and is estimated to have a uniform temperature of around 2.7 Kelvin (-270.45 degrees Celsius).
The third piece of evidence is the discovery of cosmic microwave background radiation. The CMB was accidentally discovered in 1964 by Arno Penzias and Robert Wilson while they were conducting experiments with a radio telescope. The CMB radiation is found uniformly throughout the universe and is considered one of the strongest pieces of evidence for the Big Bang. It supports the theory because it is consistent with the idea that the universe originated from an extremely hot and dense state and has since expanded and cooled down.
To learn more about these pieces of evidence, you can refer to scientific papers, books, and online resources about the Big Bang theory, Edwin Hubble's discoveries, temperature changes in the universe, and cosmic microwave background radiation.