The Virgo galaxy Cluster Much smaller than the Local Group. Contains 35 galaxies. Is part of the Centaurus Supercluster. Is held together by gravity.
Q: An important part of the lifecycle of galaxies like the Milky Way is the self regulation of…
A: Required : The correct choice.
Q: Why do the spiral arms of our galaxy move around the center of the galaxy? a) Spiral arms do not…
A: Normal spirals have arms that emanate from the nucleus, while barred spirals have a bright linear…
Q: A starburst galaxy produces only 50 new stars per year. (True or false)
A: A starburst galaxy is known for its high rate of star formation in comparison to the other galaxies.…
Q: If a standard passenger aircraft can fly at 0.37 km/s (828 mph), how long (in yr) would it take to…
A:
Q: You observe a faint galaxy and find that a spectral line normally found in the visible part of the…
A: The wavelength at which we see absorption lines are unique in themselves. This was used by…
Q: In galaxy clusters, most of the galaxies appear to be elliptical galaxies because O They formed…
A: Galaxy clusters, most of the galaxies appear to be elliptical galaxies because......... Given:…
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 might you be misled if you studied only the brightest galaxies in a cluster?
A: There are some of the observations which may mislead if you studied only the brightest galaxies in…
Q: If a galaxy contains a supernova that at its brightest has an apparent magnitude of +15, how far…
A: Given The apparent magnitude of the supernova, mv =+15The absolute magnitude of the supernova, Mv…
Q: If a typical halo star has an orbital velocity of 250 km/s, how long does it take to pass through…
A: A stellar halo is a spherical population of stars and globular cluster that surrounds most disk…
Q: A galaxy cluster has a recessional velocity of 19,000 km/s. Using the best estimate for Hubble's…
A: To calculate the distance of the distant galaxies in megaparsecs (Mpc) Hubble’s law is used. If the…
Q: solar masses. (Hint: Use the formula for circular velocity, V. = VS"; make sure you convert relevant…
A: Given Data: The orbital velocity of a globular cluster is, ve=417 km/s The distance from the centre…
Q: If a galaxy has an apparent radial velocity of 4000 km/s and the Hubble constant is 70 km/s/Mpc, how…
A: Hubble's law states that galaxies move away from Earth with a velocity proportional to their…
Q: If the active core of a galaxy contains a black hole of 106 M, what will the orbital period be for…
A: The expression for the orbital period, T=2πrv =2πrGMr =2πr32GM
Q: The very first "image" of a black hole, at the centre of galaxy M87, was recently taken by the Event…
A: Given: The wavelength of the hydrogen line is λ = 21 cm The diameter of the earth is D = 12742 km…
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: 8. If a galaxy has an apparent radial velocity of 2000 km/s and the Hubble constant is 72 km/s/Mpc,…
A: Using Hubble's law we can solve this
Q: What kinds of objects lie in the halo of a spiral galaxy?
A: Given :- Spiral galaxy and what kinds of objects lie in the halo of it.
Q: Because of interstellar dust, astronomers can see at most about 5 kpc into the disk of the galaxy at…
A: Stars create elements inside them through fusion. These will get slowly ejected as the star die.…
Q: If a galaxy contains a supernova that at its brightest has an apparent magnitude of +12, how far…
A: Given:The apparent magnitude of the supernova,mv=12Theabsolute magnitude of the supernova,Mv=-17Find…
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: If the sun is 4.6 billion years old, how many times has it orbited the Milky Way? (The sun is 8,300…
A:
Q: If active core of a galaxy contains a black hole of 10^6 M, what will the orbital period be for…
A:
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: The first stars to form in our galaxy a. had circular orbits. b. had highly elliptical…
A: Population 1 stars are the newer and younger stars.
Q: Describe the age and temperature of stars that make up spiral galaxies and their location.
A: A galaxy can be bombarded by other, smaller galaxies. Even if a galaxy is isolated, internal…
Q: If a galaxy has an apparent radial velocity of 2,319 km/s and the Hubble constant is 70 km/s/Mpc,…
A:
Q: Assume that the orbital speed of a star is measured at a distance of 15 kpc from he center of our…
A:
Q: ring galaxies often have nearby companions. What does that suggest?
A: The origin of ring galaxies is often debated. Some scientists believe that ring galaxies have formed…
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: why does the galaxy shown below have so much dust in its disk? How big do you suppose the halo of…
A: A halo is an extended, almost spherical component of a galaxy which extends beyond the main, visible…
Q: If astronomers were to find they have made a mistake and our solar system is actually 7.8 (rather…
A: Let m be defined as the mass of the sun, and M be defined as the mass of the galaxy. Since the sun…
Q: On a rotation curve you notice two points, A and B. Point B is twice as far from the center of the…
A: Given information: Point B is twice as far from the center of the galaxy as point A. Let "ra" be the…
Q: how far away is the galaxy
A:
Q: Which of the following best describe the reasons we have to infer that a supermassive blackhole…
A: Actually the blackhole is a very higher density object . According to the general theory of…
Q: Assume that an average globular cluster is 25 pc in diameter. If you observe a galaxy that contains…
A: For the small angle, the approximation is, sin θ≅ tan θ ≅ θIf the angle θ is expressed in…
Q: What is at the center of the Milky Way Galaxy?
A: Required: What is at the center of the Milky Way Galaxy?
Q: Describe the structure of the Milky Way galaxy, including its spiral arms, central bulge, halo, and…
A: The Milky Way galaxy is a barred spiral galaxy, which means it has a central bar-shaped structure…
The Virgo galaxy Cluster
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Much smaller than the Local Group. |
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Contains 35 galaxies. |
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Is part of the Centaurus Supercluster. |
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Is held together by gravity. |
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- Assume that a typical galaxy contains about 200 billion stars and that there are more than 150 billion galaxies in the known universe. Estimate the total number of stars in the universe.Given an image of a disk galaxy, you have measured that the average surface brightness at two radii (R = R1 and R = R2) are I1 and I2 respectively. The disk surface brightness profile has the exponential form of I(R) = I0 e(-R/Rd). What are the values of I0 and Rd for this disk?If a galaxy contains a supernova that at its brightest has an apparent magnitude of +25, how far away is the galaxy? Assume that the absolute magnitude of the supernova is -14. (Hint: use the magnitude - distance formula : d = 10 (Mv-Mv +5)/5 _______ Mpc
- Most of the dark matter in a galaxy is located in the ________ which allows the more luminous matter to rotate around the center of the galaxy at a faster speed than predicted by Kepler's 3rd Law.If a galaxy has an apparent radial velocity of 2000 km/s and the Hubble constant is 70 km/s/Mpc, how far away is the galaxy?what evidence is there that galaxies contain dark matter? Supermassive black holes?
- What evidence can you cite that our galaxy has a galactic corona?Why can't the evolution of galaxies go from elliptical to spiral? From spiral to elliptical?Figure 2 shows the "rotation curve" of NGC 2742. It plots the “radial velocity (V)" (how fast material is moving either toward or away from us) that is measured for objects at different distances (R = radius") from the center of the galaxy. The center of the galaxy is at 0 kpc (kiloparsecs) with a speed of 9 km/sec away from us. (These velocities have been corrected for the observed tilt of the galaxy and represent true orbital velocities of the stars and gas.) 200 100 U4779 -100 As you can see, one side of the galaxy is moving with a negative velocity (spinning toward us), while the other side has a positive velocity (spinning away from us). Using Newton's gravity equation, we will be able to determine the gravitational mass of the entire galaxy and how the mass varies versus distance from the galaxy's center. -200 -8 8 -4 Radius (kpc) Read the following text carefully and follow the instructions: Select five radii spaced evenly from 0-10 kpc across the galaxy. Your selections should…
- The Sun is at a distance of about 8 kpc from the galactic center and moves around the galactic center in a circular path with a velocity of about 220 km s. Make a rough estimate of the mass of the Galaxy.Astronomers estimate the mass of the stars in a certain galaxy to be about 3.0e40 kg, and the total mass of this galaxy to be about 1.2e41 kg. The amount of the galaxy’s mass is made up of dark matter is_____ percent.The hydrogen Balmer line has a wavelength of 486.1 nm. It is shifted to 565 nm in a galaxy's spectrum. What is the radial velocity (in km/s) of the galaxy? (Indicate the direction with the sign of your answer.)