Three pieces of evidence of universe expansion support the Big Bang Theory. The first piece of evidence, which Edwin Hubble discovered, is that Response area. The second piece of evidence is the change in universal temperature. The temperature Response area . The third piece of evidence is that Cosmic Microwave Background radiation is found Response area.
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The first piece of evidence, which Edwin Hubble discovered, is that galaxies are moving away from each other at a speed proportional to their distance. This observation, known as Hubble's Law, implies that the universe is expanding.
The second piece of evidence is the change in universal temperature. In the 1960s, two physicists named Arno Penzias and Robert Wilson discovered a faint background radiation pervading the entire universe. This radiation, known as the Cosmic Microwave Background (CMB) radiation, is not associated with any specific source and is consistent with the predictions of a hot Big Bang origin.
The third piece of evidence is that the CMB radiation is found uniformly in all directions of the sky. This isotropy of the CMB supports the idea that the early universe was in a highly dense and uniform state, which is a key prediction of the Big Bang Theory.
The first piece of evidence, discovered by Edwin Hubble, is that the galaxies are moving away from each other. This observation led to the conclusion that the universe is expanding.
The second piece of evidence is the change in the universal temperature. Scientists have observed that the universe has been cooling down over time. This is consistent with the idea that the universe began with a hot, high-energy state during the Big Bang and has been expanding and cooling ever since.
The third piece of evidence is the discovery of Cosmic Microwave Background (CMB) radiation. This is a faint radiation that fills the universe and is found in all directions. It is considered to be the afterglow of the Big Bang and provides strong evidence for the early hot and dense state of the universe. The uniformity and distribution patterns observed in the CMB support the Big Bang Theory.
To find the missing information and complete the sentences, we need to understand each piece of evidence supporting the Big Bang Theory.
1. The first piece of evidence, discovered by Edwin Hubble, is that the universe is expanding. This evidence is based on observations of galaxies moving away from each other. Hubble noticed that galaxies farther away from us are moving away faster than the nearby ones. This supports the idea that the universe is continuously expanding from a single point in the past.
2. The second piece of evidence is the change in universal temperature. This evidence is derived from the observation that the universe is filled with cosmic microwave background radiation (CMB). The CMB is a faint, isotropic radiation that originated from the Big Bang. As the universe expanded, the wavelengths of this radiation stretched and shifted towards longer wavelengths, causing a decrease in temperature. This change in temperature aligns with the predictions of the Big Bang Theory.
3. The third piece of evidence is the presence of Cosmic Microwave Background radiation. CMB was first discovered accidentally in 1965 by Arno Penzias and Robert Wilson. It represents leftover radiation from the early stages of the universe, approximately 380,000 years after the Big Bang. This radiation is isotropic and uniform in all directions, indicating its origin from a hot, dense early state of the universe. The discovery of CMB directly supports the Big Bang Theory.
Now that we have the missing information, let's complete the sentences:
1. The first piece of evidence, which Edwin Hubble discovered, is that the universe is expanding. This is supported by the observation of galaxies moving away from each other.
2. The second piece of evidence is the change in universal temperature. This change aligns with the predictions of the Big Bang Theory.
3. The third piece of evidence is that Cosmic Microwave Background radiation is found. The discovery of CMB directly supports the Big Bang Theory.