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It means that the light from galaxies is losing energy. The only reasonable explanation for this is the cosmoligical redshift - that is, that the Universe is expanding.

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How does the redshift of galaxies provide evidence that the universe is expanding?

The redshift of galaxies refers to the phenomenon where the light from distant galaxies shifts toward the red end of the spectrum, indicating that they are moving away from us. This observation, first noted by Edwin Hubble, suggests that the universe is expanding, as galaxies are not just receding from Earth but from each other. The greater the redshift, the faster a galaxy is moving away, supporting the idea that space itself is stretching. This relationship is encapsulated in Hubble's Law, which quantifies the expansion rate of the universe.


Why do scientists believe the universe is still expanding?

Scientists believe the universe is still expanding primarily due to observations of distant galaxies, which are moving away from us, a phenomenon known as redshift. This observation supports the Big Bang theory, indicating that the universe has been expanding since its inception. Additionally, the discovery of dark energy, a mysterious force driving the acceleration of this expansion, further reinforces the idea that the universe continues to grow. Measurements of cosmic microwave background radiation also provide evidence of the universe's expanding nature over time.


What is significant about the red shift spectra of galaxies?

The red shift spectra of galaxies show that most galaxies are moving away from us, indicating that the universe is expanding. This observation supports the Big Bang theory, which suggests that the universe began in a state of high density and temperature and has been expanding ever since. The amount of red shift in a galaxy's spectrum can also provide information about its distance from us and its velocity.


What does the light from distant galaxies show red shift?

The light from distant galaxies shows redshift because the universe is expanding. As the galaxies move away from us, the light they emit gets stretched, causing its wavelength to increase and shift towards the red end of the spectrum. This redshift can help scientists determine the velocity at which galaxies are moving away from us and provide insights into the expansion of the universe.


What did the discovery of background radiation distributed evenly throughout the universe provide support for?

The discovery of background radiation, known as the Cosmic Microwave Background (CMB), provided strong evidence for the Big Bang theory of the universe's origin. Its presence and uniform distribution across the universe offer a snapshot of the early universe, supporting the idea of a hot, dense beginning followed by expanding and cooling over time.

Related Questions

Which of the models predict that galaxies should be getting farther apart now?

The expanding universe model predicts that galaxies should be getting farther apart now. This is based on the observation that the universe is expanding, with galaxies moving away from each other at increasing speeds.


How does the redshift of galaxies provide evidence that the universe is expanding?

The redshift of galaxies refers to the phenomenon where the light from distant galaxies shifts toward the red end of the spectrum, indicating that they are moving away from us. This observation, first noted by Edwin Hubble, suggests that the universe is expanding, as galaxies are not just receding from Earth but from each other. The greater the redshift, the faster a galaxy is moving away, supporting the idea that space itself is stretching. This relationship is encapsulated in Hubble's Law, which quantifies the expansion rate of the universe.


Why do scientists believe the universe is still expanding?

Scientists believe the universe is still expanding primarily due to observations of distant galaxies, which are moving away from us, a phenomenon known as redshift. This observation supports the Big Bang theory, indicating that the universe has been expanding since its inception. Additionally, the discovery of dark energy, a mysterious force driving the acceleration of this expansion, further reinforces the idea that the universe continues to grow. Measurements of cosmic microwave background radiation also provide evidence of the universe's expanding nature over time.


How does expanding universe provide evidence for big bang theory?

It is not so much that the universe is expanding, but rather the rationalization for its expansion that provides evidence to support the Big Bang Theory. The Big Bang supports interpreted observational evidence of the Cosmic Microwave Background Radiation (CMBR) barrier that there is an evolutionary expansion of the universe which promotes a finite age for the universe.


What is significant about the red shift spectra of galaxies?

The red shift spectra of galaxies show that most galaxies are moving away from us, indicating that the universe is expanding. This observation supports the Big Bang theory, which suggests that the universe began in a state of high density and temperature and has been expanding ever since. The amount of red shift in a galaxy's spectrum can also provide information about its distance from us and its velocity.


What does the light from distant galaxies show red shift?

The light from distant galaxies shows redshift because the universe is expanding. As the galaxies move away from us, the light they emit gets stretched, causing its wavelength to increase and shift towards the red end of the spectrum. This redshift can help scientists determine the velocity at which galaxies are moving away from us and provide insights into the expansion of the universe.


What did the discovery of background radiation distributed evenly throughout the universe provide support for?

The discovery of background radiation, known as the Cosmic Microwave Background (CMB), provided strong evidence for the Big Bang theory of the universe's origin. Its presence and uniform distribution across the universe offer a snapshot of the early universe, supporting the idea of a hot, dense beginning followed by expanding and cooling over time.


What fact provides evidence for the big bang theory?

The facts that provide evidence that the space within our Universe was almost infinitely dense about 13.7 billion years ago, and has been expanding at a (pretty much) steady rate ever since, are overwhelmingly persuasive. 1) The distance between us and all distant galaxies is increasing, and the rate at which that distance is increasing is directly proportional to the distance to those distant galaxies. 2) The existence, spectrum, and isotropy of the cosmic microwave background radiation. 3) The ratio of hydrogen to helium in all parts of our Universe. 4) Quasars are seen far from us, but not close to us. 5) The ratio of long-lived isotopes to their decay products. 6) The absence of white dwarf stars older than about ten billion years. These facts make Big Bang Cosmology as solid an idea as a heliocentric solar system.


How do you determine the conditions that existed in the very early universe?

Scientists look at various pieces of evidence, such as the cosmic microwave background radiation, the distribution of galaxies, and the abundance of light elements, to infer the conditions that existed in the very early universe. These pieces of evidence help provide insight into the energy, temperature, density, and expansion of the universe in its infancy.


What do scientists believe provides evidence for the bid bang theory?

Scientists believe that several key pieces of evidence support the Big Bang theory, including the observed expansion of the universe, cosmic microwave background radiation, and the abundance of light elements like hydrogen and helium. The redshift of distant galaxies indicates that the universe is expanding, while the cosmic microwave background radiation is thought to be the afterglow of the initial explosion. Additionally, the proportions of light elements align with predictions made by Big Bang nucleosynthesis. Together, these observations provide strong support for the theory.


What else supports the big bang theory besides the red shift?

Other evidence supporting the Big Bang theory includes the cosmic microwave background radiation, the abundance of light elements in the universe, and the large-scale structure and distribution of galaxies in the universe. Additionally, observations of the universe's expansion and the Hubble law provide further support for the Big Bang theory.


Did the galactic cluster support the big bang theory?

Yes, the distribution and movement of galaxies in galactic clusters provide evidence for the big bang theory. The observation of cosmic microwave background radiation, galaxy redshift, and the uniform expansion of the universe within these clusters all support the theory of the universe originating from a hot, dense state and expanding over time.