Take another look at the figure of the Milky Way Galaxy we have used in previous questions. Let's say a friend of yours glances a the Image (without the labels) and exclaims "Hey, isn't that the picture of the Milky Way that

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A: The galaxy with stars bulged at the center surrounded by a disc with arms is called a spiral galaxy.…

Q: Suppose that the outer stars of a galaxy have an orbital velocity of 150 km/s. If the radius of the…

A: Given data: rgalaxy=4 kpcv=150 km/s Need to determine the orbital period of the outer stars.

Q: The figure below shows the spectra of two galaxies A and B.  Please can i get help  with this…

A: Dear student as per the QnA guidelines I will be answering the first 3 subparts of this problem…

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

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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: Using our example from the previous unit, let's try to determine the Hubble time for this example…

A: Solution     Given dataSpeed v=4000km/sDistance d=20Mpcwhat would the age of that universe be in…

Q: What are the challenges of determining the structure of the Milky Way? Dark matter absorbs light…

A: 1. Dark matter does not absorb, reflect or emit light.

Q: Astronomers now think that there is a black hole with more than 4 milliion times the mass of our Sun…

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Q: A given star orbits the center of its galaxy at an average speed of v_star, at a distance of r_star​…

A: Given, Velocity of star,vS=200km/s=200×103m/sRadius of star,RS=9 kpc=9×3.086×1019mVelocity of…

Q: If a galaxy is 9.0 Mpc away from Earth and recedes at 488 km/s, what is H0 (in km/s/Mpc)?  km/s/Mpc…

A: The question above has been given from Hubble's law. This law is also known as the Hubble-Lemaitre…

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: We know that there are small particles (called dust) in the galaxy which dim the light coming from…

A: A galaxy is a large assembly of stars, gas, and dust, held together by gravity.

Q: It is possible to derive the age of the universe given the value of the Hubble constant and the…

A: Given  distance of glaxy (d) = 235 million light-…

Q: given: a (distance to center of galaxy in AU) = 1,717,914,439 AU P (suns orbital period in years)…

A: Given: a (distance to center of galaxy in AU) = 1,717,914,439 AU P (suns orbital period in years) =…

Q: random times over the last 1010 years. The rate of star formation is simply the number of stars…

A: Number of stars in our milky Way galaxy is  N=9×1010 Time taken in the formation of a plane

Q: The Andromeda Galaxy is a member of the Local Group of galaxies. It is approaching us. Does this…

A: Given Andromeda galaxy is member of the local group of galaxies approaching us. Hubble law Hubble…

Q: An astronomical image shows two objects that have the same apparent magnitude, i.e., the same…

A: Let the luminosity of the star is Ls= LoLuminosity of  Milky Way galaxy, Lm=1011LoLuminosity of…

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: Astrophysicists estimate that there are about 100 billion galaxies in the universe, and thaton…

A: Question :           Which is larger ? The number of stars in the universe or number of grains of…

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

A: T T T F T T

Q: Pretend that galaxies are spaced evenly, 2.0 Mpc apart, and the average mass of a galaxy is 1.0 x…

A: We know that:-Spherical galaxy average density,ρ=M43πr23         Equation 1r=2.0 Mpcconvert Mpc to…

Q: (a) Estimate the height (z) above or below the Galactic plane for the globular cluster M13 (1,b =…

A: The galactic plane is the plane on which the majority of a disk-shaped galaxy's mass lies. Distance…

Q: Let's say that the number density of galaxies in the universe is, on average, 3 × 10–68 galaxies/m3.…

A: Given :number density of galaxies, n = 3 × 10–68 galaxies/m3            Observable distance by…

Q: Among the globular clusters orbiting a distant galaxy, one is moving at 534 km/s and is located 14…

A: Given data: Speed of the globular clusters around the galaxy is, v= 534 km/s= 534000 m/s Distance of…

Q: Our galaxy is approximately 100,000 light years in diameter and 2,000 light years thick through the…

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Q: he Milky Way's

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Q: The time for a galaxy to cross from one side of a cluster to the other is called the crossing time.…

A: We are given the velocity of galaxy. We are also given the diameter of cluster. This diameter is…

Q: How often (in years) does a planetary system form in our galaxy?

A: Number of stars in our galaxy = 3 x 1011 stars time to consider = 1010 years rate of star formation…

Q: Suppose that stars were born at random times over the last 1010 years. The rate of star formation is…

A: Given that, The total number of stars in the Milky way is N=8×1011 And the stars were born at random…

Q: If an O-type star and our galaxy were at the same distance, which would have a greater magnitude? a)…

A: Given: The O-type star and our galaxy at same distance. The apparent magnitude decreases with the…

Q: If a galaxy is 8.9 Mpc away from Earth and recedes at 497 km/s, what is H, (in km/s/Mpc)? km/s/Mpc…

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Q: Consider that the absolute luminosity of the disk of the Milky Way, in the blue band, is L_B=…

A: Given The total luminosity of the galaxy                  = 2.3×1010 LB Sun The absolute magnitude…

Q: Milky Way galaxy has about 5 x 10° solar masses of gas in total. If 13 solar masses of that gas is…

A: Thousands of stars, dust particles, and gas fill the Milky Way. Observing it from the top or bottom…

Q: What is the period-luminosity relation and how did this help determine the size of the Milky Way?

A: In astronomy, a period-luminosity relation is a relationship between the light emitting ( lumonisity…

Q: If the sun is 4.6 billion years old, how many times has it orbited the Milky Way? (The sun is 8,300…

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Q: As we discussed, clouds are made of a great many small drops. Really - a great many. Imagine a…

A: As per Bartleby guideline, we will solve first three subparts.  Given that:Volume of cloud, Vcloud=1…

Q: An astronomer observed the motions of some galaxies. Based on his observations, he made the…

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Q: If you find a galaxy that is the same size and mass as our Milky Way Galaxy, what orbital velocity…

A: Mass of our galaxy (M1): 4.0 X 1011 M Semi-major axis of the orbit (a): 51 kpc

Q: Imagine that you have achieved immortality and you used it to travel outside of the Milky Way (you…

A: If you were to leave the Milky Way and travel at 1/10th of the speed of light, it would take you…

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: The Andromeda Galaxy is 2 million light years away from the Milky Way.  How far away is the…

A: A light year is the distance travelled by the light in a year

Q: If a galaxy is 9.0 Mpc away from Earth and recedes at 488 km/s, what is H, (in km/s/Mpc)? | km/s/Mpc…

A: Hubble discovered that galaxies appear to move away from Earth and the velocity of recession (v) is…

Q: Let's say that the number density of galaxies in the universe is, on average, 3 × 10–68 galaxies/m3.…

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Q: A scientist, using a telescope, sees arcs of light around a galaxy. In 3–5 sentences, explain the…

A: Answer:-    A scientist, using a telescope, sees arcs of light around a galaxy. The arcs of light…

Q: Based on comparison with the Moon, it can be calculated that Andromeda would have to have a diameter…

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Q: Are the galaxies red-shifting or blue-shifting? Explain. (You may find the big-bang theory helpful).…

A: This problem can be solved using the Hubble's Law.

Q: 2. A galaxy cluster has a galaxy behind it whose image we see as being smeared out and curved, with…

A: The objective of this question is to calculate the mass of a galaxy cluster given the redshifts of…

Q: Quasars, an abbreviation for quasi-stellar radio sources, are distant objects that look like stars…

A: Radio wave frequency, f=1665 MHz f=1665 MHz=1665×106 HzThe wavelength; λ is to be…