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: 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: 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: 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: 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: In the image below you see two interacting galaxies; one is nearly face -on and the other is nearly…
A: The shape of the galaxies says the evidence of the tidal disruption.
Q: Cepheid-stars, which are examples of “Standard Candles", are useful to astronomers as indicators of…
A: Solution: Cepheid variable stars and Type Ia supernovae are the most valuable standard candles.…
Q: Write down the Doppler formula for light as an equation. Explain each letter's meaning. Then compute…
A:
Q: igure 2: Left: A picture of a nearby galaxy taken with an ultraviolet telescope. Right: A picture of…
A:
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: Different wavelengths (frequencies) of light let us see different aspects of the galaxy, which type…
A: Required : The correct option.
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: Why do you think the Andromeda galaxy has four times the stars as the Milky Way, yet is only…
A: One of the important attribute for the galaxies are that its Galactic halo which is an extended ,…
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: At the speed of light, approximately how long would it take to travel all the way across the Milky…
A: Milky way galaxy length(diameter) is about 100,000 light-years. And 1 light-year is the distance…
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: Black Hole Accretion Disk. Part A: If the inner accretion disk around a black hole has a…
A:
Q: What is milky way ?
A: The Milky Way is a barred spiral galaxy, a vast and intricate cosmic structure that contains our…
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 are globular clusters and what did the ones in the Milky Way help us to measure?
A: SPACE AND ASTRONOMY
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: Calculate the Schwarzschild radius for Milky Way.
A: To calculate schwarzschild radius of milky way
Q: It seems that most of the mass in the Milky Way (about 95%) is made of some sort of matter that does…
A:
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: 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: The image below combines visual (blue) with radio (red) to show the galaxy radio astronomers call…
A: The presence of large radio lobes is manifest from the red portion of the image. Also the presence…
Q: Identify a feature of the Whirlpool Galaxy that is visible in all several types of light. Explain…
A:
Q: For the first two targets of the Event Horizon Telescope, astronomers selected Sag A* in the Milky…
A: In this question we have to answer why did astronomers choose the distant candidates. Please give…
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…
Q: The star-gas-star cycle will keep the Milky Way looking just as bright in 100 million years as it…
A: Given :- The star-gas-star cycle will keep the Milky Way looking just as bright in 100 million years…
Step by step
Solved in 2 steps with 2 images
