What factors resist the contraction of a cloud of interstellar matter?
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 are metals less abundant in older stars than in younger stars?
A: Answer: The metals which basically are non hydrogen and helium material are produced or created in…
Q: If a prostellar disk is 260 au in radius and the disk plus the forming star together contain 7 solar…
A:
Q: What would most bright nebulae look like if there were no interstellar dust?
A: A nebula is defined as a large region of interstellar clouds made of dust, hydrogen, helium, and…
Q: In the direction of a particular star cluster, interstellar extinction allows only 12% of a stars…
A: Given In the direction of a particular star cluster, interstellar extinction allows only 12% of a…
Q: What is the orbital speed at the disk's outer edge in kilometers per second if a protostellar disk…
A:
Q: The dust in a molecular cloud has a temperature of about 34 K. At what wavelength (in nm) does it…
A: temperature = T = 34 K wavelength = λmax=?
Q: If you assume that a globular cluster 2 arc minutes in diameter is actually 27 pc in diameter, how…
A: The expression for the distance from small angle formula, Angular diameter206265=linear…
Q: If a giant molecular cloud is 73 pc in diameter and a shock wave can sweep through it at 9 million…
A: Given: The diameter of the giant cloud is d = 73 Pc. The time taken by the shock wave to pass…
Q: A giant molecular cloud is 30 pc in diameter and has a density of 339 hydrogen molecules/cm^3. What…
A: Concept used: Mass is found by multiplying by density and volume of sphere.
Q: A typical dense core of an interstellar gas cloud has a diameter of 0.2 pc and a mass of 2 solar…
A: The diameter of the gas cloud is defined as 0.2 pc. Therefore, the radius of the gas cloud will be…
Q: If you assume that a globular cluster 6 arc minutes in diameter is actually 18 pc In diameter, how…
A:
Q: If a protostellar disk is 210 AU in radius and the disk plus the forming star together contain 4…
A: the orbital speed is, v=GMr one solar mass is 1.989×1030 kg and 1 AU is 1.496×1011 m. thus,…
Q: Nickel is a material in which the process of O a. magnetization is done easily, but demagnetization…
A: Answer a. magnetization is done easily, but demagnetization is difficult
Q: Now, rank the same objects by increasing temperature. For spherical objects, use the surface…
A: Intercloud gas: The gases other than intersteller gases present in space are known as intercloud…
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: ar formation, themselves f
A: Newton formulated equations which showed the gravity behavior. He determined the force of gravity…
Q: If a globular cluster contains 2 million stars and is 28 pc in diameter, what is the average…
A: This problem can be solved by first calculating the average volume reserved for one star and then…
Q: If you assume that a globular cluster 2 arc minutes in diameter is actually 19 pc in diameter, how…
A: Given, a globular disc cluster is 2 arc minutes in diameter. The actual diameter is d = 19 pc let D…
Q: Suppose you observe a star orbiting the galactic center at a speed of 1100 km/s in a circular orbit…
A:
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: Gas clouds that form stars are pulled together by which of the following?
A: The correct option is A : Gravitational Fields
Q: How many Big Macs can fit in the Grand Canyon taking into account gravity and the varying dimensions…
A: The average standard volume of the Grand Canyon is V1=4.17×1018 cm3. The average standard volume of…
Q: Soft iron is a material, in which the process of O a. magnetization and demagnetization is difficult…
A: Here, we have to discuss the property of Soft iron.
Q: you assume that a globular cluster 4 arc minutes in diameter is actually 27 pc in diameter, how far…
A:
Q: A two-arm spiral density wave is moving through the Galactic disk. At the 8-kpc radius of the Sun's…
A:
Q: Hotter, more massive stars are virtually absent from globular clusters. What does this tell us?…
A: Globular clusters are clusters of stars, that are nearly symmetrical and round shaped clusters.…
Q: Based on what you know about the interactions between stars and other interstellar media, select all…
A: Interstellar space and formation of stars Interstellar space is the space between stars. This space…
Q: Why are interstellar lines so narrow?
A: Spectral lines are formed due to electrons making transitions between the energy levels inside the…
Q: A typical hydrogen atom in interstellar space only undergoes a spin-flip once every 107 years. How…
A:
Q: Given a low density cloud of Hydrogen atoms, what happens when the temperature of the cloud is…
A:
Q: describe the characteristics of the various kinds of interstellar gas (HII regions, neutral hydrogen…
A: Star formation is generally more active in the denser, inner part of the Milky Way than in the outer…
Q: What temperature would interstellar dust have to have to radiate most strongly at 100 micro meter?
A: When stars die they will slowly send out their outer layers. This forms large clouds of dust and is…
Q: You observe two randomly chosen stars 10,000 lightyears from Earth. One is in the disk of the Milky…
A: In this question we have to observe two randomly chosen stars 10,000 lightyears from Earth. One is…
Q: describe how the 21-cm line of hydrogen is formed. Why is this line such an important tool for…
A: In space almost all of the hydrogen atoms are in ground state. The electron moves around the proton…
Q: 13-4. The Sun is moving with speed 2.5 X 105 m/s in a circular orbit about the center of the Galaxy.…
A: Given data: speed of sun, v = 2.5 x 105 m/s To find: i) Time period…
Q: The RR Lyrae stars in a globular cluster have apparent magnitudes of 14. Assuming an absolute visual…
A: Given that the apparent magnitude mv=14 and the absolute visual magnitude Mv=0.5, substituting…
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