If most galaxies are moving away from us, are we at the center of the universe? Why or why not?
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: 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: (b) Draw the shape of the Milky Way for a spaceship with a velocity of 20%, 50%, and 90% of the…
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Q: What is dark matter, and what evidence exists for it? What effect does dark energy have on the…
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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: So if our universe is about 15 billion years old. Do we think this because we can't see farther away…
A: We are known the age of universe. We are given that age of universe is about 15 billion years. There…
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: cceptable theoryaboutthe origin of the formation of universe and what does it state about the…
A: The widely accepted theory for the origin and evolution of the universe is the Big Bang model,…
Q: How the universe expands?
A: The expansion of the universe is just the increase in distance between any two selected…
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: Suppose that we were to discover that all galaxies are actually twice as far away as we think. How…
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Q: Calculate the age of the universe for the following Hubble's constant, (b) 65 km/s/Mpc
A: As per Hubble's law, the universe is expanding. If we assume that the expansion's apparent velocity…
Q: Which galaxies are moving the fastest away from us?
A: Our nearest galaxy is Milky way.
Q: What is the only thing that remains constant all over the universe
A: A constant is a quantity that is conserved with time. And and Invariant quantity is something that…
Q: What is the the steady-state theory of the universe, and why was it abandoned? What theory do we…
A: A per the Steady-State theory, the universe is always expanding but it is maintaining a constant…
Q: 17). If you were to live another 65 years and there was a starship ready to go right now, how fast…
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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: When the universe was approximately one second old its size grew by a factor of 10 to the power of…
A: When the universe was approximately one second old its size grew by a factor of 10 to the power of…
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: Calculate the age of the universe for the following Hubble's constant, 200 1... - N (d) 20 km/s/Mpc
A: As per Hubble's law, the universe is expanding. If we assume that the expansion's apparent velocity…
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: If the Hubble's constant was 100 km/s/Mpc instead of 70 km/s/Mpc what would be the estimated age of…
A: It was observed that the galaxies were moving away from us. Edwin Hubble calculated their recession…
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 is the Big Bang? What evidence do we see in the Universe that everything-which-exists exploded…
A: Bigbang - It is presumably more like a balloon being gust up. A balloon begins small and dilates…
Q: Under what circumstances would the slope of the best-fitted line in Figure decrease:
A: Required The correct choices.
Q: Calculate the age of the universe for the following Hubble's constant, m (c) 80 km/s/Mpc Of
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Q: What is cosmic infalation ? Explain it.
A: Cosmic inflation: This is the theory based on the inflation in the cosmology. It was developed in…
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: What is the twin paradox?
A: the twin paradox is a thought experiment in special relativity involving identical twins, one of…
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: What evidence can you cite that the expansion of the universe is accelerating?
A: It is observed that galaxies are moving away from Earth at speeds proportional to their distance.…
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: 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…
Q: With the aid of one or more diagram, explain how observations of the CMB can be used to determine…
A: In a flat or zero curvature universe, Euclidean geometry applies at the very largest scales. This…
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