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What are the spectral lines of starlight from distant galaxies?
They are the characteristic frequencies of the elements "burning up" in the stars in the galaxy interspersed with absorption lines of other material between these elements and the earth. All these wavelengths will be increased by the red shift which results from the galaxy receding from the earth.
According to Hubble's Law the most distant clusters of galaxies are?
The basic idea of Hubble's Law is that galaxies (or galaxy clusters) that are farther away move away from us faster than those that are closer to us.The most distant galaxy yet found is a protogalaxy with the designation UDFj-39546284, with a redshift z = 11.9, about 13.42 billion light-years distant from the Milky Way.In case you are asking for the most distant CLUSTER of galaxies, and not the most distant astronomical galaxy, the answer would be the cluster (or protocluster, science is not yet sure about the nature of this structure) which denomination is BoRG-58 , with a redshift z≅8, and about 12 billion light-years distant from us.
Do distant galaxies have more heavy elements than nearby galaxies?
The distribution of metals (In astronomy, that is any element other that hydrogen and helium) is reliant of the population stars. (See related question) Metal rich stars, population I stars, are the latest "breed" of stars, whereas population III stars are the oldest and are classed as metal free stars. So the furthest galaxies are likely to be formed from the initial gases from the big bang and will be metal free stars,
How does redshift support the notion of the expanding universe?
The redshift of distant galaxies is believed to be a result of the Doppler effect - in other words, the light is shifted towards lower frequencies ("redshifted") due to the fact that the galaxies move away from us.
Do action-at-a-distance forces require physical contact between objects?
No. A couple of examples:- . The Cosmic Microwave background, is the residual radiation signature left over from the time of the creation of the Universe from the Big Bang. . The determination, by means of a spectroscope, of the spectral lines indicating the presence of particular elements in a distant star. . You may argue that the traffic microwave radar has its waves impinging on the target vehicle, but most would consider this a non-contact measurement.
The spectral lines from distant galaxies do not match spectral lines on Earth due to?
The spectral lines from distant galaxies do not match those on Earth because of the Doppler effect, cosmic expansion, and differences in elements present in the galaxies. These factors cause the observed spectral lines to be shifted or altered compared to what we see on Earth.
Based on the observed red shifts in the spectral lines of distant galaxies?
Astronomers conclude that the universe is expanding, because wavelengths are increasing.
What are the spectral lines of starlight from distant galaxies?
They are the characteristic frequencies of the elements "burning up" in the stars in the galaxy interspersed with absorption lines of other material between these elements and the earth. All these wavelengths will be increased by the red shift which results from the galaxy receding from the earth.
How do astronomers determine the composition of distant celestial objects?
Astronomers use spectroscopy to determine the composition of distant celestial objects. By analyzing the light emitted or absorbed by the object, they can identify the elements present based on their unique spectral fingerprints. This technique allows astronomers to study the chemical makeup of stars, galaxies, and other astronomical bodies.
When did Hubble discover that the universe was expanding?
Edwin Hubble discovered that the universe was expanding in 1929 when he observed that distant galaxies were moving away from us, as indicated by their redshift in their spectral lines. This discovery led to the formulation of Hubble's law, which describes the relationship between a galaxy's distance and its velocity of recession.
Who discovered the red shift in stars the same effect that causes sound waves to change pitch as an object moves towards or away from an observer?
The red shift in stars was first discovered by astronomer Vesto Melvin Slipher in the early 20th century. He observed that the spectral lines of distant galaxies were shifted towards longer wavelengths, indicating that these galaxies were moving away from us.
The visible part of distant galaxies is the galaxies what?
The "nucleus".
How the presence of certain element is confirmed in distant stars?
spectral analysis of light of stars help us
What have astronomers seen beyond your galaxy?
We have observed distant galaxies. The furthest object so far observed is a small galaxy that has been dated to be about 13 billion years old. About 750 million years after the big bang.
Scientists believe that the more distant galaxies formed?
Scientists believe that galaxies formed earlier in the universe's history, with the most distant galaxies being some of the first to have formed after the Big Bang. Studying these distant galaxies can provide insights into the early stages of galaxy formation and evolution.
Why do scientist study the light coming from distant galaxies?
They study distant galaxies because they want to know whats out in other galaxies and how many planets it has
Why do scientists study distant galaxies to learn about galaxies?
Scientists study distant galaxies to understand the formation, evolution, and properties of galaxies over time. By observing galaxies that are far away, they can explore the universe at different epochs and gain insights into how galaxies have changed and evolved since the early universe. Studying distant galaxies also helps scientists refine theories about the laws of physics and the nature of the universe as a whole.
