What is the period-luminosity relation and how did this help determine the size of the Milky Way?
Q: What color is the center of this galaxy and why?
A: The supermassive black hole is the centre of the galaxy is located at inside the bright white patch…
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: 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: The hydrogen Balmer line has a wavelength of 486.1 nm. It is shifted to 552 nm in a galaxy's…
A: The red shift of hydrogen is, 1+z=λ2λ1z=552486.1-1 =0.1356
Q: Indicate whether the following statements are true or false. (Select T-True, F-False. If the first…
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Q: What are the three main types of galaxies, and what are the peculiarities? What type is the Milky…
A: There are three main types of galaxies. They are, spiral galaxies, elliptical galaxies, and…
Q: If galaxy A is three times more distant than galaxy B, then according to the Hubble law, galaxy A…
A: According to Hubble's law, the recession velocity is proportional to the proper distance of the…
Q: how do deep images by the Hubble Space Telescope confirm the bottom-up theory of galaxy formation?
A: The bottom up model, also known as Hierarchal Clustering s the most accepted way for galaxy…
Q: If the local supercluster is 52 Mpc in diameter, how long does light take to travel from one side to…
A: The diameter of the supercluster is given as 52 megaparsecs. 1 parsec = 3.262 light year
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: 21-centimeter radiation observations of the galaxy reveal a. the location of neutral hydrogen…
A: Correct Option is "a"
Q: Write down the Doppler formula for light as an equation. Explain each letter's meaning. Then compute…
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Q: igure 2: Left: A picture of a nearby galaxy taken with an ultraviolet telescope. Right: A picture of…
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Q: What is dark current ? On what is it depends?
A: Required : What is dark current.
Q: For the picture below what is the differences of light spectra of different galaxies. compared to a…
A: The spectrum given here refers to the absorption spectrum. The distant stars and galaxies absorb the…
Q: Assume that the Milky Way has a central bulge of uniform density with a radius R. Also assume that…
A: 1) In the rotation velocity profile of the galaxies, the velocity of the stars outside the bulge…
Q: tudying for test: A new astronomical measurement suggests that the Hubble constant is 1112…
A: Given the new value of of the Hubble constant H0=1112km/s/MpcWe know1Mpc=3.086×1019kmHence…
Q: Explain why galaxies can have different shapes. please explain briefly and clearly
A: Reason why galaxies have different shapes : When we gaze up into the night sky, we can see stars…
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: Explain how we can observe the following in the Milky Way: a) Ionized hydrogen b) Neutral atomic…
A: Ionized hydrogen is formed when neutral hydrogen atoms are stripped off their electrons by being…
Q: What do you understand by wave? Explain how the formation of hydrogen and helium atoms make it…
A: A wave is a propagating dynamic disturbance of one or more quantities. Waves involve the transport…
Q: I Take the diameter AB of the Earth's orbit as 3 x 10 km and consider a star S at a distance d, such…
A: solution of the question 1 figure is attached to this problem
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: 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: Black Hole Accretion Disk. Part A: If the inner accretion disk around a black hole has a…
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Q: What is milky way ?
A: The Milky Way is a barred spiral galaxy, a vast and intricate cosmic structure that contains our…
Q: True or False: Dwarf elliptical galaxies and giant ellipticals probably formed in entirely different…
A: To find true or false: Dwarf elliptical galaxies and giant ellipticals probably formed in entirely…
Q: 5. A star whose temperature is 8000 K has a peak wavelength of 362.5 nm, according to Wien's Law. If…
A: The peak wavelength by observer on earth = 362.365nm.Your required explanation is given below. Thank…
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: What is a standard candle in the astronomical sense? How do Cepheid variables fit into this and what…
A: For distances which are too large to measure using parallax, astronomers use 'standard candles'.…
Q: 6. If a spiral galaxy is 20' in diameter and you measure its distance to be 1 Mpc, what is its…
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Q: An object's position is given by x = 09 m/s, 9 m/s -3 m/s, 3 m/s -6 m/s, 6 m/s O-10 m/s, 10 m/s 5 -…
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Q: What are globular clusters and what did the ones in the Milky Way help us to measure?
A: SPACE AND ASTRONOMY
Q: It seems that most of the mass in the Milky Way (about 95%) is made of some sort of matter that does…
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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: How fast and in what direction must galaxy A be moving relative to us if an absorption line found at…
A: Relativistic Doppler Effect: When a source emitting waves of certain frequency and wavelength moves…
Q: What part did globular clusters play in the determination of the size and shape of the Milky Way?
A: Globular Clusters: These are nothing but a group of stars which are strongly bounded by the gravity.…
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: le of our g
A: Given: To explain the sharpley determines the sun and galaxy size as,
Q: Suppose you want to observe the molecular gas in a galaxy with redshift z using the rotational…
A: Suppose you want to observe the molecular gas in a galaxy with redshift z using the rotational…
Q: If a quasar is 1,360 times more luminous than an entire galaxy, what is the absolute magnitude of…
A: The absolute magnitude of the Milky Way galaxy is mA = - 21 FB/FA = 1360 Let mB = absolute…
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: A human eye is most sensitive to that wavelength( Am) at which the energy distribution of solar…
A: Given, (a) Wien's displacement constant,b=0.29cmKTemperature,T=5800K According to the Wien's Law the…
Q: Which of the following is not correct regarding Cepheid variable stars. They can be measure out…
A: Cepheid variables are not main sequence stars. Rather, they are stars that are in the helium burning…
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