Three pieces of evidence of universe expansion 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 ________
The first piece of evidence, which Edwin Hubble discovered, is that galaxies appear to be moving away from each other. This observation, known as Hubble's Law, suggests that the universe is expanding.
The second piece of evidence is the change in universal temperature. Scientists have found that the universe is cooler today than it was in the past. This supports the idea of an expanding universe, as the cooling would be a result of the universe stretching out.
The third piece of evidence is that Cosmic Microwave Background radiation is found throughout the universe. This radiation is believed to be remnants of the intense energy released during the Big Bang. Its presence and homogeneous distribution provide strong support for the idea of an initial explosion that led to the expansion of the universe.
The first piece of evidence, which Edwin Hubble discovered, is that galaxies are observed to be moving away from us, and the farther away a galaxy is, the faster it appears to be moving away from us.
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 aligns with the predictions of the Big Bang Theory, where the universe started with an extremely hot and dense state and has been cooling down over time.
The third piece of evidence is that Cosmic Microwave Background (CMB) radiation is found throughout the universe. The CMB radiation is the residual thermal radiation left over from the early stages of the Big Bang. Its discovery in 1965 by Arno Penzias and Robert Wilson provided strong support for the Big Bang Theory, as it matched the predicted characteristics of the afterglow of the initial rapid expansion.
The first piece of evidence, discovered by Edwin Hubble, is that galaxies are moving away from us at high speeds. This supports the Big Bang Theory because it suggests that the universe is expanding. Hubble observed that the light from distant galaxies is shifted towards longer wavelengths, known as redshift. This redshift indicates that galaxies are moving away from us, and the farther away they are, the faster they are moving.
The second piece of evidence is the change in universal temperature. According to the Big Bang Theory, the universe started in a highly dense and hot state and has been expanding and cooling ever since. This means that the temperature of the universe should decrease over time. Scientists have measured the temperature of the universe using various methods, such as the Cosmic Microwave Background (CMB) radiation.
The third piece of evidence is the presence of Cosmic Microwave Background (CMB) radiation. This is a faint radiation that permeates the entire universe and is believed to be leftover radiation from the Big Bang. About 380,000 years after the Big Bang, the universe cooled down enough for atoms to form. This allowed photons to travel freely without being absorbed by charged particles. These photons comprise the CMB radiation, which was discovered in 1965 by Arno Penzias and Robert Wilson. The existence of CMB radiation provides strong support for the Big Bang Theory, as it demonstrates the afterglow of the initial hot and dense state of the universe.