black hole.
Q: critical density
A:
Q: The temperature of the CMB today is T=2.725 K. Calculate the temperature of the CMB at redshift…
A: Given T = To = 2.725 K z = 2000 Temperature of CMB at redshift 'z' is given by T = To (1+z)
Q: 3. The formula for Hubble's Law using the velocity v is valid only for velocities much smaller than…
A: Given data: Redshift z=4.89. The recessional velocity is given as, v=cz+12-1z+12+1 Here, c is the…
Q: Describe a quasar.
A: Quasar is an extremely luminous active galactic nucleus. inside quasar there is a supermassive black…
Q: The traditional theory of the formation of our galaxy CANNOT explain a. the existence of the disk…
A: a. The existence of the disk of the galaxy
Q: Two stars are in a closely orbiting binary system. The smaller star (a K-type main sequence star)…
A: The correct option. Following the mass transfer, which of the following is now true of the main…
Q: The sun is about 8 kpc from the center of the galaxy. A kpc or kiloparsec is equal to a. 10…
A: A kpc or kiloparsec is equal to the 1000 parcec Here, In the option this value is not given
Q: Current evidence suggests that the universe is a. flat, infinite, and neither expanding nor…
A: To determine: The correct option.
Q: If a galaxy is receding at 0.05 c, how far away is the galaxy if the Hubble parameter is 70…
A: How far away is the galaxy. speed of galaxyv=0.05 chubble constantH=70 km/sMpc
Q: 7. If a car was on the highway and was trying to pass another ar and went from a speed of 60 m/s to…
A: Given : vo = 60 m/s v = 75 m/s t = 3 seconds
Q: Galaxy will emit synchrotron radiation as a sun forms
A: The star forming region of a Spiral Galaxy will emit synchrotron radiation as a sun forms in the…
Q: We know that dark matter must exist in galaxies. If not, many of the stars in a galaxy would ...…
A: Dark Matter is an unknown matter which is not visible. The reason behind its invisibility is, it…
Q: Recall that Hubbleʹs law is written v = H0d, where v is the recession velocity of a galaxy located a…
A: Given data: Hubble's constant (H0) = 80 km/s/Mpc Distance (d) = 800 Mpc Required: Recession velocity…
Q: ased on what you have learned about galaxy formation from a protogalactic cloud (and similarly star…
A: Dark matter do not emit any radiation The pressure of an ideal gas decreases when temperature drops…
Q: At what redshift will the Lya line (2o = 1215°A) be centered in the Johnson-Cousins U band? (Quasars…
A: From the redshift formula, we have 1+z=λobsλemitz=redshiftλobs=obserevd…
Q: If the expanding layers of a supernova move at a constant velocity of v = 10, 000 %3D km/s and the…
A: Given: velocity of supernova v=104 km/s mass of the supernova M=2.4×1031 kg Ephoton=mc2 Time taken…
Q: The age of the Milky Way Galaxy has been estimated to be at least 13 billion years based on a.…
A: Our Milky Way galaxy is barred spiral galaxy and it is surrounded by Halo which contains cluster of…
Q: If the universe is closed and finite, then a. the universe has a center and an edge. b. the…
A: If the universe is closed and finite, then the final fate of the universe will be very cold and of…
Q: If a galaxy is 9.1 Mpc away from Earth and recedes at 511 km/s, what is H0 (in km/s/Mpc)? 2. What…
A: Note: As per the policy, only the first question will be solved. If you want the solution for other…
Q: What was the most startling discovery about the universe that occurred in 1998? O its expansion is…
A:
Q: The relation between the Doppler shift of galaxies and their distances is called Olbers's…
A: The relationship between the Doppler shift of galaxies and their distance is called Hubble's…
Q: The large black hole at the center of our galaxy is estimated to be a. 3.7 solar masses. b.…
A: Given : Asked to choose the correct option for the mass of the large black hole present at the…
Q: Observations of quasars have shown us that many are extremely _________, emitting more energy than…
A: Required : Fill in the gaps.
Q: 2. Sirius is about 9.00 ly from Earth. To reach the star by spaceship in 10.5 y с 50 ssf60 $09J$$…
A:
Q: an introduction on what is the event horizon of a black holes?
A: The occasion horizon of a black hollow is a essential idea in astrophysics that marks the boundary…
Q: Which of the following is an accurate statement about quasars?
A: ANS: They are abnormally massive, luminous stars at the cores of ancient galaxies.
Q: The orbital speed of a star about the center of the Milky Way is determined by its distance from the…
A: The galactic center is orbited by the Sun. Therefore, if we are able to calculate the Sun's speed…
Q: Assuming that hydrogen fusion requires the Universe to have a temperature of T > 10’ K (as measured…
A:
Q: Suppose you wanted to measure the distance to an elliptical galaxy around 5 Mpc away using variable…
A: Given: To measure the distance in an elliptical galaxy having 5 Mpc used as the variable stars. To…
a. |
a helium flash.
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b. |
a planetary nebula.
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c. |
the abundance of matter flooding into the black hole.
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d. |
a supernova.
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e. |
synchrotron radiation.
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- True or False: Dwarf elliptical galaxies and giant ellipticals probably formed in entirely different ways.a. Trueb. FalseWhich of the following might you expect to be an additional consequence of the fact that galaxies contain more mass than expected?A. The gravitational force between galaxies is greater than expected.B. Galaxies appear less bright than expected.C. Galaxies are farther away than expected.D. There are more galaxies than expected.The speed of light in vacuum is 300,000 km/s. Suppose that the pulse rate of a pulsar is 0.001 s. Then its size cannot be bigger than about O A. 30,000 km. OB. 300,000 km. OC.3,000 km. O D. 300 km.
- The hydrogen Balmer line Hβ has a wavelength of 486.1 nm in the laboratory. It is observed in a quasar at 2430.5 nm. What is the redshift of this quasar? a. 5 b. 0.5 c. 0.25 d. 4 e. 1944.4The theory that waves of compression move around the galaxy triggering star formation is called a. the flocculent theory. b. the spiral compression theory. c. the density wave theory. d. the differential rotation theory. e. none of the above.If the mass density of the universe is above the critical density as it appears to be with the mass detected so far, then the universe is a. flat b. negatively curved C. in steady state d. positively curved
- 4The redshift due to the Doppler effect is caused by sources of light obscured by interstellar dust. sources of light moving away from the Solar System. an effect not yet believed to be understood. sources of light moving at right angles to the Solar System. sources of light moving toward the Solar System.What is the redshift of this quasar?
- 4. Black holes are theorized to form from (HS-ESS1-3) a. very massive planets that collide with very large stars, resulting in an excessive amount of matter This matter collapses onto itself, extinguishing the star and resulting in the black hole b. very massive stars when their core nuclear fuel has essentially expired, resulting in the core collapsing in on itself. This is due to gravitational forces that act without nuclear fusion counteracting them C. very small stars when their outer shell nuclear fuel expires, leaving the dense core to collapse in on itself. This results in massive gravitational forces d. very young stars that do not have enough nuclear fuel to start the massive chain reactions normally produced in stars emitting large amounts of electromagnetic energy 5. What evidence helps supports the idea of the Big Bang Thoery (HS-ESS1-2) a. Earth Soil Samples b. Neil DeGrass Tyson c. Apparent motion of planets d. Red shift of distant light38. Many RR Lyrae stars are found in open clusters in the plane of the galaxy. True False8) Calculate the velocity of a galaxy with a redshift of 0.37.