If all the distant galaxies are moving away from us, explain why we are not at the center of the universe.
Q: Cite an evidence that we are living in an expanding universe.
A: The universe we are living in is expanding. This is evident from Hubble's observations in 1929. A…
Q: As the Universe becomes older, what effect will that have on a slope of the Hubble's diagram: It…
A: Doppler effect in light is the change in frequency of light observed by the observer when the source…
Q: What are the three important pieces of evidence that led scientists to accept the Big Bang as the…
A: The Big Bang model is one of the many theories that were developed to explain the birth of the…
Q: "The Big Bang" pg. 165, question 2 In Diagram A, is the universe becoming bigger, smaller, or…
A: Universe is expanding all the time since the big bang.
Q: How do physicists measure the expansion rate of the universe?
A: How do physicists measure the expansion rate of the universe?
Q: Which factor has slowed down the expansion of the universe?
A: The expansion of the universe has slowed down because the object pull each other towards themselves…
Q: How can astronomers view events that happened in the universe’s distant past?
A: We all know that time travel is not possible, so an astronomer can't go into the past using a time…
Q: responding to a claim that the number of grains of sand was infinite, calculated that the number of…
A: Given information: The Archimedes estimate of the number of grains needed to fill the universe (n1)…
Q: Gravity played an important role in the formation of solar systems, stars, and galaxies. What role…
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Q: Astronomers have measured the age of the Universe to be about 14 billion years. Explain how this age…
A: Astronomers estimated that the age of universe is about 12 to 14 billion years. There are two…
Q: Calculate the age of the universe if the Hubble's constant was 60 km-s¹ Mly¹.
A: Our universe is constantly expanding, It was observed by Edwin Hubble when he saw the galaxies…
Q: Calculate the critical density of our universe.
A: Our universe is expanding and critical density is defined as the average density of matter that is…
Q: What is the evidence that the universe was very uniform during its first 400,000 years?
A: The universe was formed from a big explosion called Big Bang. In the beginning, everything was…
Q: What if the Andromeda galaxy were to disappear How long before we would notice?
A: About 2.5 million light-years separate our solar system from the Andromeda galaxy. If it vanished,…
Q: If we find a galaxy that is moving away at 72,000 km/s, what does Hubble’s law tells us about the…
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Q: What do you think of the statement: The universe has no center and no edge (or boundary)?
A: The description of the universe that it has no centre and no edge actually tells a lot about the…
Q: What does the size difference of the irregularities in the background radiation tell us about the…
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Q: Is the universe open or closed?
A: the universe as "closed," "open," or "flat," meant that the density of the universe was either so…
Q: Can we measure distances to other galaxies using parallax? Why or why not?
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Q: Why aren’t the fluctuations there in the formation of Galaxies and other similar entities?
A: Galaxies and the other similar entities could not be without the existence of fluctuations in the…
Q: What is the evidence that the universe was very uniform during its first 400,000 years?
A: The evidence of the uniform nature is explained by particle physics. Before the formation of the…
Q: Why do theorists feel the universe is flat?
A: Why do theorists feel the universe is flat
Q: What does the redshift of the galaxies tell us about their motion with respect to the Earth?
A: The displacement of the spectrum of an astronomical object toward longer wavelength (red) due to the…
Q: What was the lowest temperature for photons to be able to produce 0 particles in the early universe?…
A: Given: kT=mc2
Q: Explain why it only appears that we are at the center of expansion of the universe and why an…
A: Universe is expanding from everywhere and it has no center of expansion. Materials expand from a…
Q: Consider three periods in the history of the Universe: one million years after the Big Bang (age = 1…
A: In early times, the Universe was expanding at a rapid pace. Then, the rate of expansion of the…
Q: What evidence shows that the universe is flat
A: Exact shape of the universe can not be predicted.
Q: Assume the observable Universe is charge neutral, and that it contains n nuclei (hydrogen plus…
A:
Q: Calculate the age of the universe if the Hubble's constant was 29.45 km-s¹ Mly''.
A: It is observed that the galaxies in our universe are moving away from each other. This expansion of…
Q: How do we know andromeda galaxy is moving towards us?
A: Andromeda Galaxy is the closest galaxy to Milky Way at 2.5 million light-years. Unlike other…
Q: There exists an element visible in the spectrum of galaxies that shows the following spectra when…
A: Introduction: The Doppler effect refers to the apparent shift in the wavelength of a wave when there…
Q: how big is the universe in numbers
A: The universe is made up of all of space, time, and everything that exists within them, including all…
Q: 3 Billion Light-years 2 Billion 2 Billion Light-years Light-years 2.5 Billion 2.5 Billion…
A: Introduction: Hubble's law is the observation that galaxies are moving away from the Earth at speeds…
Q: How do we know galaxies are moving away from us?
A: Electromagnetic radiations are affected by the Doppler shift. When the source is in relative motion…
Q: Explain how astronomers determined that the universe is expanding.
A: In universe there are millions of stars. These stars are always moving towards Earth or away from…
Q: TRUE OR FALSE: Current mass estimates and deceleration rates tell us that our universe is closed
A: The radiation filled Universe dilutes faster; it's density drops because the volume expands, while…
Q: What is negatively curved universe?
A: A surface has negative curvature at a point if the surface curves away from the tangent plane in two…
Q: Olbers’s paradox deals with which of these questions? a. Is the universe accelerating? b. Why…
A: Olbers’ paradox deals with: b. Why is the sky dark at night?
Q: To what extent do astronomers have the ability to see into the history of the universe?
A: Introduction: We are all aware that time travel is not feasible, so an astronomer cannot use A time…
If all the distant galaxies are moving away from us, explain why we are not at the center of the universe.
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