1. How do the stars in the disk of the galaxy differ from the ones in...
1. How do the stars in the disk of the galaxy differ from the ones in the bulge and halo?
2. What triggers formation of stars in the spiral arms of our galaxy?
Homework Answers
1) Galaxy consists of three parts: Disk, bulge , halo
The stars in bulge areolder than stars in disk. The sun is an example of star in the disk. While the density of stars in halo is much lower than density of stars in disk. The stars in the halo are quite old.
2) The clouds of gas and dust move through the spiral arms of our galaxy, the increased density ( squeezing clouds of gas) triggers star frmation.
Add Answer to:
1. How do the stars in the disk of the galaxy differ from the
ones in...
Which observation(s) is evidence that most of the stars, gas, and dust in our galaxy is in a thin disk? Select all...
Which observation(s) is evidence that most of the stars, gas, and dust in our galaxy is in a thin disk? Select all that apply O Radio, X-ray,and gamma ray observations show gas in a band across the sky O Infrared observations show dust in a band across the sky O Individual stars appear in a band across the sky O Globular clusters appear in all directions on the sky Question 15 1pts Which observation(s) provide evidence that our galaxy formed...
Take an idealized galaxy made of 1011 sun-like stars distributed in a disk that is 50...
Take an idealized galaxy made of 1011 sun-like stars distributed in a disk that is 50 kpc in diameter and 1 kpc thick. We wish to build (i.e. with our hands) a scale model of the galaxy substituting a grain of sand and shrinking each star proportionally. (Assume R∗ = 7 × 108 m and Rsand = 1 mm). a) What is the size of the model galaxy’s disk? Practically speaking is this a good scale to use for our model?...
Stars in elliptical galaxies move like the bulge or halo stars in spiral galaxies. a. Why...
Stars in elliptical galaxies move like the bulge or halo stars in spiral galaxies. a. Why can’t the rotation curve method to determine mass be used for elliptical galaxies? b. Masses of elliptical galaxies are often derived from their velocity dispersions. This part illustrates how a velocity dispersion can be determined: The intrinsic line-width of a K giant star might be 0.5 Å at a central wavelength λ0 = 5000 Å. Suppose an elliptical galaxy is observed which has a...
(R1 2.4) Suppose the stars in our galaxy have constant orbital speed, v = 220 km...
(R1 2.4) Suppose the stars in our galaxy have constant orbital speed, v = 220 km s-1, out to the edge of a spherical dark matter halo at distance R 200 kpc. Estimate a "characteristic" time for collapse as tcollR/v. What is the maximum z at which you would expect to see galaxies comparable in R and v to our own galaxy in the concordance model with ?1n at-1-?? 0.3 and h 0.77
choose correct answer. no explanation needed QUESTION 10 How do astrophysicists account for neutrino emission from...
choose correct answer. no explanation needed
QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact...
Do the the stars within a galaxy move away from each other due to the Universe’s...
Do the the stars within a galaxy move away from each other due to the Universe’s expansion? Explain your reasoning
Can you please answer these both questions? Thank you! 1, 14pt] Math Clasification of the galaxy with the picture. (For each statement beow select in order the symb the picture.) 1) E3 2) Sa 3) SBe 4...
Can you please answer these both questions?
Thank you!
1, 14pt] Math Clasification of the galaxy with the picture. (For each statement beow select in order the symb the picture.) 1) E3 2) Sa 3) SBe 4) EO 5) Sc 6) Irregular 7)SBa 2. [ipt] Indicate whether the following statemets are most true for elliptical or spiral galaxies. (Select S-Spi, E- Elliptical. If the fist is S and the rest E,enter SEEEEE) A) Contain abundant clouds of cool gas and...
Astronomers can't travel to the stars. Telescopes do all the work. How do we know that...
Astronomers can't travel to the stars. Telescopes do all the work. How do we know that the spectra of a star is what we say it is? That is, how do we know those elements and molecules are there, even though the star is trillions of miles away? What does a spectra that is shifted tell us about a star or galaxy?
Explaination for how alternative marketing choices differ from traditional ones? thank you
Explaination for how alternative marketing choices differ from traditional ones? thank you
1.What are trans fats and how do they differ from other kinds of fats? 2. What...
1.What are trans fats and how do they differ from other kinds of fats? 2. What are the major sources of artificial trans fats in our diet today? What was the first manufactured food product to contain artificial trans fats? Why did the popularity of products containing artificial trans fats grow in the 1950s-1980s? Why did Canada and other countries recently ban these substances, and why does one of doctors interviewed in that occasion call them “a real tragic story...
Which observation(s) is evidence that most of the stars, gas, and dust in our galaxy is in a thin disk? Select all that apply O Radio, X-ray,and gamma ray observations show gas in a band across the sky O Infrared observations show dust in a band across the sky O Individual stars appear in a band across the sky O Globular clusters appear in all directions on the sky Question 15 1pts Which observation(s) provide evidence that our galaxy formed...
(R1 2.4) Suppose the stars in our galaxy have constant orbital speed, v = 220 km s-1, out to the edge of a spherical dark matter halo at distance R 200 kpc. Estimate a "characteristic" time for collapse as tcollR/v. What is the maximum z at which you would expect to see galaxies comparable in R and v to our own galaxy in the concordance model with ?1n at-1-?? 0.3 and h 0.77
choose correct answer. no explanation needed
QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact...
Can you please answer these both questions?
Thank you!
1, 14pt] Math Clasification of the galaxy with the picture. (For each statement beow select in order the symb the picture.) 1) E3 2) Sa 3) SBe 4) EO 5) Sc 6) Irregular 7)SBa 2. [ipt] Indicate whether the following statemets are most true for elliptical or spiral galaxies. (Select S-Spi, E- Elliptical. If the fist is S and the rest E,enter SEEEEE) A) Contain abundant clouds of cool gas and...
Most questions answered within 3 hours.
-
Learning Outcomes:
Upon the successful completion of this module, you should
understand the following concepts:
Strategic...
asked 1 minute from now -
A 0.2m diameter ball with an initial velocity of 8m/s rolls up a
hill without slipping....
asked 6 minutes ago -
Identify four of the five major types of organizations within
the federal bureaucracy, and give examples...
asked 6 minutes ago -
The following data have been obtained
for the effect of solvent composition on the solubility of...
asked 6 minutes ago -
Our ability to see distinct edges as well as our errors in
contrast perceptions (e.g., seeing...
asked 26 minutes ago -
Two buckets of mass 17.1 kg and 11.3 kg are attached to the ends
of a...
asked 19 minutes ago -
A laser used in LASIK eye surgery produces 50 pulses per second.
The wavelength is 192...
asked 16 minutes ago -
Smith Inc. recently reported operating income of $2.75 million,
depreciation of $1.20 million, and had a...
asked 17 minutes ago -
A
nurse is trying to understand the structure and chain of command of
a healthcare organization....
asked 19 minutes ago -
A company is interested in estimating the costs of lunch
in their cafeteria. After surveying employees,...
asked 23 minutes ago -
A woman expends 94 kJ of energy in walking a kilometer. The
energy is supplied by...
asked 34 minutes ago -
you want to measure the gravitational acceleration at your
location. since g does not vary significantly...
asked 39 minutes ago