Olbers’s paradox poses an interesting question: If the universe is infinite, then any line of sight should eventually fall on astar’s surface. Why then is the sky dark at night? Discuss the commonly accepted evolution of the universe as a solution to thisparadox

Q: what is time-space distanciation and compression? in short words.

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Q: Assume a flat FRW universe, dominated by radiation throughout its history. Calculate the physical,…

A: The objective of the question is to calculate the physical, cosmological horizon size at a given…

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: e gravitational energy of a pair of colliding galaxies , each of mass 10 Mo separated by a distance…

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Q: Indicate whether the following statements are true or false. (Select T-True, F-False. If the first…

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Q: why in the pythagorean theorem formula is it "a^2 - b^2" instead of "a^2 + b^2"

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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 would be the Hubble constant if the universe were 18 billion years old?

A: The age of universe is given as, t = 18 billion years (or) t = 18×109 years TO DETERMINE: The…

Q: How long will it take, in years, until today’s Hubble radius has expanded to 9 times its current…

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Q: Explain Fermi Paradox?

A: This is a question related to astrophysics. Fermi Paradox: Fermi paradox can be defined as the…

Q: Consider a universe in which the Hubble constant has been measured to have the value H0 = 50…

A: Hubble's law gives the idea that the universe is continuously expanding, and that galaxies are…

Q: If a standard passenger aircraft can fly at 0.27 km/s (604 mph), how long (in yr) would it take to…

A: The problem is based upon distance time relation. We know that distance is the length. For very…

Q: What are the possible fates for the universe? What do they depend on? What appears to be the actual…

A: In cosmology, the possible fates of the universe are broadly categorized into several scenarios…

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: Scientists agree that the age of the universe is about 4 billion years old, does the age of the rock…

A: Given:  Half life of radioactive potassium = 1.25 billion years Ratio of stable argon to radioactive…

Q: How the universe expands?

A: The expansion of the universe is just the increase in distance between any two selected…

Q: Explain why Olbers’s paradox is not a paradox.

A: In the early history of astronomy, it was believed that the universe is static, infinite, uniform,…

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: According to the cosmological principle, our place in the universe does not appear to be…

A: According to the cosmological principle, our place in the universe does not appear to be…

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: 3. Consider a galaxy at a distance of 1.7 Mpc from Earth, in which the rotational velocity of the HI…

A: Note: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question…

Q: Consider a universe in which the Hubble constant has been measured to have the value Ho = 50…

A: Given: The measured value of the Hubble constant is H0 = 50 km / s / Mpc

Q: 1. What is the total energy output of a radio galaxy in the local Universe (at z = 0.1) with a flux…

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Q: 1) Astronauts orbiting the earth in the space shuttle experience a force of gravity that is…

A: Astronauts orbiting the earth in the space shuttle experience a force of gravity that is : several…

Q: Astronomy) Cygnus Loop Velocity. If the Cygnus Loop is 25 pc in diameter and is 10,000 years old,…

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Q: An electron jumps from n=3 to n=2 in a hydrogen atom in a distant galaxy, emitting light. If we…

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Q: -0.5 = Compute the Oort constants A and B for Keplerian rotation: 0(R) Oo (R/Ro) in terms of eo and…

A: Solution: The Oort constants are given by the following: A=-dΘdRR0-Θ0R0…

Q: If a galaxy is 9.3 Mpc away from Earth and recedes at 508 km/s, what is H, (in km/s/Mpc)? |km/s/Mpc…

A: velocity, v=508 km/s distance, d=9.3 Mpc=9.3×3.086×1019 Km=28.7×1019 Km. Hubble constant,…

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: Why do theorists feel the universe is flat?

A: Why do theorists feel the universe is flat

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: According to the version of the Big Bang Theory without a Cosmological Constant (and without Dark…

A: Hubble's Law states that as the universe is expanding in all directions, the receding velocity of an…

Q: How many galaxies are there in the universe?

A: A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and…

Q: How can you explain the fact that the Andromeda Galaxy appears to be approaching us rather than…

A: Each element emits photons only at a certain wavelength. They form either emission or absorption…

Q: Most of the stars we can see with the unaided eye in our night sky are hundreds or even thousands of…

A: The question is asking us to comment on the feasibility and practicality of visiting, communicating…

Q: Assume a flat Friedmann-Robertson-Walker universe. Calculate the redshift z at which the temperature…

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Q: If most galaxies are moving away from us, are we at the center of the universe? Why or why not?

A: Introduction: The universe encompasses everything in existence, from the smallest atom to the…

Q: Describe what is meant by Olbers’ paradox. Explain how it is solved by our modern understanding of…

A: Olbers' paradox explains the dark effect of the sky. It is also known as the dark night sky paradox.…

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: (a) What Hubble constant corresponds to an approximate age of the universe of 1010 y? To get an…

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Q: le of our g

A: Given: To explain the sharpley determines the sun and galaxy size as,