How do we know galaxies are moving away from us?
Q: What is the evidence that dark matter exists?
A:
Q: The Centaurus supercluster of galaxies is 52 Mpc from Earth. How long (in years) does it take light…
A: Given that The Centaurus supercluster of galaxies is 52 Mpc from Earth. then we have to determine…
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: 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: What is your reflection about the big bang theory?
A: Big bang theory assumes that universe was a dense point initially. And then it started to expand…
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 the difference between hot dark matter and cold dark matter? What difference does that make…
A: Dark matter is a mysterious substance that makes up almost 85% of the universe's total mass. It…
Q: If a group of galaxies is revolving around its center at 240 miles/sec how fast is it moving in…
A: Let the galaxy's speed be denoted by v. The speed of the galaxies is 240 miles per second.
Q: How the universe expands?
A: The expansion of the universe is just the increase in distance between any two selected…
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: Tell me what is dark matter?
A: It is required to discuss about the dark matter.
Q: Which galaxies are moving the fastest away from us?
A: Our nearest galaxy is Milky way.
Q: How did Harlow establish the sun's position in the galaxy and the galaxy's size?
A: Given How did Harlow establish the sun's position in the galaxy and the galaxy's size, as following…
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: How do we measure Dark Matter?
A: Two methods were used by DES scientists to measure dark matter. Firstly, maps of galaxy positions as…
Q: How do gamma-ray bursts provide insights into the most energetic events in the universe?
A: Gamma-ray bursts (GRBs) are extremely energetic explosions that have been observed in distant…
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: What exactly is dark matter?
A: Particles that do not absorb, reflect, or emit light, hence cannot be detected by electromagnetic…
Q: Can we measure distances to other galaxies using parallax? Why or why not?
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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: 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: What evidence shows that the universe is flat
A: Exact shape of the universe can not be predicted.
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: Briefly discuss and compare the three general types of galaxies.
A: We need to discuss and compare the three general types of galaxies.
Q: If you find that the Hubble constant is double what we currently believe, how does this affect the…
A: Q) If you find that the Hubble constant is double what we currently believe, how does this affect…
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: le of our g
A: Given: To explain the sharpley determines the sun and galaxy size as,
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: 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: What is dark matter? (200 words)
A: Answer:Dark matter is a form of matter accounting 85% of the matter in the universe and about a…
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: Does Hubble's Law work well for galaxies in the Local Group (such as Andromeda)?
A: Hubble law states that the velocity of the galaxies which are moving away also known as the…
Q: Does it make sense to ask, “If the universe is expanding, what is it expanding into?”
A: To explain the correct answer for the given question is as follows,
Q: The Perseus-pices supercluster of galaxies is 64 Mpc from Earth. How long (in years) does it take…
A: Given: Perseus-pices supercluster separation from earth→D=64 Mpc Standard conversion: 1…
Q: Hubble's galaxy classification diagram (the "tuning fork"), suggests the existence of black holes…
A: Hubble's galaxy classification diagram (the "tuning fork")
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